Fibonacci

While the foundation of the Tower of Pisa was being being laid, a man was born nearby who developed math skills that might have helped the ill-fated architectural wonder.
Leonardo Pisano ("of Pisa") (c.1175-c.1250) was the son of Guglielmo Bonacci. Although known as "Leonardo Pisano" during his lietime, he signed his name "Bonacci" on his writings; an 1838 writer referred to him as "Fibonacci"—short for filius Bonacci ("son of Bonacci")—and the name stuck with his modern fans.

His father was a customs officer in Algeria, and between living there and traveling around the coast of the Mediterranean, Leonardo grew up exposed to education outside of the Greco-Roman/Western European tradition. He recognized the advantages of the Hindu-Arabic system of numbers over using Roman numerals, and worked to popularize it in Europe, starting with his 1202 work Liber Abaci ("Book of the Abacus" or "Book of Calculating"). In it, he presented to Europe the decimal system by which we all learn the four basic mathematical functions in school.

Calculating with the four functions in a decimal system.

The decimal system, with its "places" for ones and tens and hundreds, etc.,  was much "neater" than the system of Roman numerals and included a digit for "zero." Roman numerals had no "zero," and the words null or nihil were used to express a lack of something. The Roman tradition had great difficulty with the concept of "nothing" in math, because it seemed inappropriate to have a "something" that would indicate a "nothing."

If people have heard of Fibonacci in the present day, it is usually because of a particular sequence of numbers associated with him. In Chapter 12 of the Liber Abaci, he presents a math problem: how many rabbits are created in one year starting with one pair? After describing the progression in words, he shows the number progression as 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377. Examples of this series existed prior to Fibonnaci, and it is likely that he was simply repeating something he had learned, but 19th century mathematician Edouard Lucas called this sequence the Fibonacci numbers. They have been found to relate to many phenomena found in nature. (A thorough discussion is impossible here, but look.)

A webpage with some simple representations of the Fibonacci sequence is here.

The First Female Professor of Medicine

The medical school in Salerno had on its staff the first well-known female physician and professor of medicine. Sadly, we know nothing of her personal life, not even her dates: her existence at Salerno in the 11th or 12th centuries is inferred from the handful of texts she wrote or contributed to. Fortunately, her texts were considered important enough that they were preserved and copied, translated and distributed throughout Europe.

Trotula

Her name was Trotula (listen here for pronunciation), and we find it on several texts. The best-known is the three works collectively known as La Trotula.

• Conditions of Women—based on the Latin translation of an Arabic work, with additions of several Latin-based passages that had been around for awhile.
• Treatments for Women—"a disorganized collection of empirical cures with only a thin theoretical overlay."*
• Women's Cosmetics—a head-to-toe listing of ways to beautify all aspects of a woman's appearance, with no medicinal applications.

Although there are conditions that make no sense to modern medicine (such as a "wandering womb"), there are also techniques that we would consider very sound, such as using opium on the patient during childbirth (defying church tradition that women should suffer; see Genesis 3:16), and using silk thread to repair tears that occur in childbirth.

Some scholars have attributed these works to a man, perhaps through simple chauvinism, but also because it is believed that the frank addressing of gynecological topics would be too indelicate for a female author of the era. The author of La Trotula, however, self-identifies in the texts as a woman, and the analysis of history is always turning up surprises that challenge modern notions of medieval sensibilities. Also, in Chaucer's Canterbury Tales, the book of wicked wives read by the Wife's husband Jankyn includes the name "Trotula." However little we may know of her now, it seems she developed a reputation that preserved her name for at least a couple centuries after her prime.

*Quotation from The Trotula: An English Translation of the Medieval Compendium of Women's Medicine, by Monica Green.

The Edict of Salerno

Salerno, located on the lower "shin" of Italy's southwest coast, has been occupied continuously since pre-historic times, frequently changing hands due to the many wars in the peninsula. Despite the changing political landscape, however, at least one feature of Salerno rose to a prominence that it held for several centuries, through several political shifts.

We don't know precisely when the Schola Medica Salernitana (Medical School of Salerno) was founded, but at some point, the dispensary of a 9th century monastery became a focal point for medical study and earned the title of the first medical school in history. Because of the fame of the school, Salerno became known as the "Town of Hippocrates."

The School today.

One of its unique qualities for the time was that it not only was well-versed in the Greco-Roman traditions of Hippocrates, Galen, Dioscorides and others. Its proximity to North Africa and Sicily gave it access to Arabic learning (Sicily was under Arab control from 956 until 1072). In fact, it was the arrival in 1077 of the Tunisian Muslim merchant-turned-monk Constantinus Africanus that started a Golden Age at the school. He compiled the Liber Pantegni (Book of All Arts).  It was (as is typical for the time) largely a collection of the work of others, but it drew together Greek and Arabic medical knowledge in what is called the earliest surviving Western medical treatise [source].

Salerno produced other medical texts as well. A 12th century pair named Johannes and Matthaeus Plantearius wrote the Liber de Simplici Medicina (Book of Simple Medicine). Several books on gynecology and cosmetics were created by the most famous woman doctor of the time.

Salerno thrived, even after Holy Roman Emperor Frederick II declared the Edict of Salerno. The Modern Age would approve of the Edict: it created a legal separation between physicians and apothecaries. Physicians could no longer prescribe medicines that they themselves prepared and sold. The Edict also fixed prices to prevent overcharging the sick. Over time, this Edict was copied throughout Europe, and we have reason to be glad that similar regulations exist today.

The Two Kings Henry

Henry, the young king.

For a time, the Capetian Dynasty in France had the habit of naming and actually crowning the king's heir in the old king's lifetime. King Stephen and King Henry II of England adopted this policy. In June 1170, King Henry II crowned his 15-year-old son Henry. Watching the ceremony would have been the 13-year-old Richard (later King and Lionheart), 12-year-old Geoffrey, and 3-year-old John (later "Bad King John").

"Young King Henry" (1155-1183) was considered handsome, charming, and popular; however, he showed no apparent skill or interest in politics, military skill, or even ordinary intelligence. For these reasons, it is probably good that his father never entrusted him with any authority. In fact, Henry II seems to have used his son as a political tool.

• Henry was betrothed to Margaret, daughter of Louis VII of France, on the condition that her dowry would be the Vexin, the border region between the England-held Normandy and France itself. (A nice expansion of England's property on the continent.)
• Because Pope Alexander III needed help dealing with Frederick I, Holy Roman Emperor, he acquiesced to Henry's request to allow the children to be married in 1160, giving England the Vexin. (There was no ceremony until 1172.)
• Henry had the royal wedding officiated by the Archbishop of York instead of the Archbishop of Canterbury, as was customary. This was likely an attempt to put the Archbishop of Canterbury, Thomas Beckett, in his place. (He would be dead six months later.)

The benefit of naming your heir early was to avoid disputes at the senior king's death over the succession. In this case, however, since young Henry would inherit vast lands with the throne, he was given a house and staff and large income—and even one of the most respected men of the age, William Marshal, as a tutor in arms—but not provinces and territories like his younger brothers. Consequently, his brothers had more power than he. This would have rankled the young king while his father lived on...and on.*

In 1173, Henry the young king led a rebellion with his brothers, his mother,  the kings of France and Scotland, the Count of Flanders, et alia, against his father (this really was the most turbulent family in the Middle Ages). The same qualities and actions that brought Henry II rivals and enemies, however, also brought him great wealth, and he was able to hire sufficient mercenary forces to put down what was later called the Great Rebellion. (It was the English opposition to all the foreign mercenaries on England's soil that prompted Henry to create the Assize of Arms.)

Young Henry rebelled again in 1183 against his father and his brother, Richard, over Richard's iron-fisted rule of the Duchy of Aquitaine. Henry had the help of his brother Geoffrey and Aquitaine locals who were willing to throw off Richard's rule, but the sudden death of the young king on June 11, 1183, ended the attempt. He was a little over 28 years old. King Philip of France, the brother of Margaret, lost little time in asking for the return of her dowry, the Vexin.** Instead of the land, France accepted an annual payment from Henry II.

Because he never ruled, he is not counted in the list of Kings of England. He is neglected by history in favor of his younger brothers, but he is not without fans: a recent website is devoted to him.


*Queen Elizabeth should be glad that the House of Windsor does not appear to have any of the Plantagenet temper.
**The 1967 movie The Lion in Winter is a highly fictionalized—and highly entertaining—account of this meeting.

Roger of Hoveden

One of the men who went on the Third Crusade (talked about here and here), wrote accounts of some of the events of that adventure, notably The Fall of Jerusalem, 1187 and Laws of Richard I (Coeur de Lion) Concerning Crusaders Who Were to Go by Sea. He didn't witness the Fall of Jerusalem himself, however, having gone over with Richard I in August 1190 and returning to Europe in August 1191 with Phillip II of France.

Roger of Hoveden (d.1201?) was unknown to history until 1174, when Henry II sent him on a secret mission to the lords of Galloway in southwest Scotland. His name suggests he was born in what is now called Howden, in Yorkshire. His death date is inferred from the fact that one of his historical works, called the Chronica, breaks off suddenly at 1201.

The Chronica (Chronicles) is an attempt (like the Anglo-Saxon Chronicle) to create a comprehensive history of England. For the parts of English history preceding his own life, he mostly just copies earlier works. From 732-1170, he uses other works. From 1170-1192, he copies his own earlier work, the Gesta Henrici II et Gesta Regis Ricardi (Works of Henry II and Works of King Richard).* The Gesta is the best evidence that Hoveden must have been well-connected at Henry's court: he shows detailed knowledge of political events, and is more sympathetic to Henry's side in the ongoing disputes between Henry and his sons and others. From 1192 until its abrupt end in 1201, the Chronica (along with the Gesta) is a valuable tool for understanding some of the changes in England's constitutional development.

Here is an excerpt from the Chronica for 1183, with what might seem an interesting puzzle:

In the year of grace 1183, being the twenty-ninth year of the reign of king Henry, son of the empress Matilda, the said king of England was at Caen, in Normandy, on the day of the Nativity of our Lord; the king also, and Richard and Geoffrey, ... . After the Nativity of our Lord, the king ordered the king, his son, to receive homage from Richard, earl of Poitou, and from Geoffrey, earl of Brittany, his brothers; on which, in obedience to his father, he received the homage of his brother Geoffrey, and was willing to receive it from his brother Richard, but Richard refused to do homage to him; and afterwards, when Richard offered to do homage to him, the king, the son, refused to receive it. Richard, feeling greatly indignant at this, withdrew from the court of the king, his father, and going to Poitou, his own territory, built there some new castles and fortified the old ones.

Does it seem to you that there are two kings mentioned here? There are. Tomorrow we'll look at when England had two Kings Henry at the same time.

*This work was originally attributed to Abbot Benedict of Peterborough, because his name appeared on a copy in Benedict's library. Benedict's library-building habits are well-known, however, and evidence exists that he had a copy of the Gesta made from its original source.

From Scroll to Book

DailyMedieval has mentioned books several times, and it occurs to me that people might be asking themselves "When he says book does he mean scroll? When did the switch to binding flat pages take place?"

Surprisingly early, as it happens. The earliest examples of bookbinding are from India before the Common Era, where a sutra (from the word for "a rope or thread that holds things together") was made from palm leaves, written on, then sewn together along one edge; enclosed in wooden boards, the excess thread was wound around the boards to keep all together. Buddhist monks carried this technique through Persia, Afghanistan, Iran, until it reached China in the 1st century BCE.

This method spread slowly, but by the 4th century CE bound books and scrolls were being produced in equal numbers (based on surviving texts). Using wooden boards to contain information was not a new idea. Wax tablets in a wooden frame existed from Roman times right through the Middle Ages (as mentioned here). The word "book," however, was not being used the way we use it today. Isidore of Seville (c.560-636), the famous early etymologist, said:

A codex is composed of many books; a book is of one scroll. It is called codex by way of metaphor from the trunks (codex) of trees or vines, as if it were a wooden stock, because it contains in itself a multitude of books, as it were of branches.

As for the word "book" itself, which eventually replaced the word "codex," its likeliest origin is in the word for beech. This has led scholars to assume that some of the earliest collections of writing (that weren't on scrolls) were written on beech wood.

The important point is that the development of the codex method of holding data increased the longevity of "books" over scrolls, which did not have hard covers and which experienced wear every time they were unrolled and re-rolled. "Books" could now be made larger, as well, without falling apart; meaning, for example, an entire Bible could be contained in one printed object.

Were there differing opinions on the usefulness or appropriateness of the different styles of "book"? Perhaps there were, although any difficulties in adapting to the new style probably did not go like this.

The Groma

[We had so much fun with the Jacob's Staff (well, I did), that I hope you don't mind talking so soon about another tool for more measurement.]

Roman roads, the grid system for Roman camps, sections of Hadrian's Wall—how did they get their lines so straight? They used a groma. The groma had several parts:

• The Upright: a long pole with a metal point on the bottom for driving it into the ground.
• The Rostro: an arm that extended horizontally from the top, then angled upward, designed to swivel where it attached to the Upright.
• The Groma: a cross of four equal-length arms, with its center at the top-point of the Rostro. From the end of each arm, an equal length plumb line descended.
• The Marker Peg: a plumb line that descended from the center of the Groma's cross-piece all the way to the ground.

The Upright would be stationed so that the Marker Peg fell to what you wished to be the center of your surveying. From there, you could swivel the Rostro so that each arm extended to the cardinal points of the compass. Once the four plumb lines ceased swaying, you could send your assistant toward the horizon (standard distance was 125 paces). By getting behind the groma and sighting so that two opposite plumb lines were aligned, you could, with a wave of your hand, guide your pole-carrying assistant laterally until his vertical pole aligned with the plumb lines. You now had a straight line of hundreds of feet between two points, exactly along the direction you wanted.

Who used the groma? Land surveyors, or as they were called in Latin, Agrimensores (from ager, "field" and mensura, "measure). Which brings me to the Corpus Agrimensorum Romanorum ("The Work of Roman Surveyors"), considered the earliest scientific or technical manuscript that exists, from a time (the 5th-6th centuries) when most documents were about religion or literature (or politics). The page seen here is from the section on laying out a house as opposed to a settlement. One picture is of the house, and one is of the property lines around it.

A 1554 edition of the Corpus added illustrations to the text with grid-lines to show the accuracy of the process. A few examples of its pages and illustrations can be seen here. And if you are interested in robots, you might get a chuckle from this after today's post.

Anglo-Saxon Chronicle

The Anglo-Saxon Chronicle has been mentioned here. King Alfred the Great (849-899) originally ordered its creation around 890 for a record of important events since the birth of Christ; it was maintained by anonymous scribes until the end of the reign of King Stephen in 1154. The original language is Anglo-Saxon, also known as Old English, a language all but unrecognizable to speakers of Modern English. By the 12th century, the vocabulary of entries was shifting to early Middle English. No single original manuscript exists. Of the nine fragments known, seven were found in the Cotton Library (see the above link), although the best version is in the Parker Chronicle at Corpus Christi College, Cambridge. The fragments have differences; some are surely scribal errors, some are definitely attempts by the copyist to "correct" or "amend" what they were copying with their own knowledge/beliefs.

It is, of course, historically highly inaccurate. The scribes were working with the best knowledge they had at the time, and motives ascribed to important political figures are suspect. Here is the opening, (collated from different manuscripts):

The island Britain is 800 miles long, and 200 miles broad. And there are in the island five nations; English, Welsh (or British), Scottish, Pictish, and Latin. The first inhabitants were the Britons, who came from Armenia, and first peopled Britain southward. Then happened it, that the Picts came south from Scythia, with long ships, not many; and, landing first in the northern part of Ireland, they told the Scots that they must dwell there. But they would not give them leave; for the Scots told them that they could not all dwell there together; "But," said the Scots, "we can nevertheless give you advice. We know another island here to the east. There you may dwell, if you will; and whosoever withstands you, we will assist you, that you may gain it." Then went the Picts and entered this land northward. Southward the Britons possessed it, as we before said. And the Picts obtained wives of the Scots, on condition that they chose their kings always on the female side; which they have continued to do, so long since. And it happened, in the run of years, that some party of Scots went from Ireland into Britain, and acquired some portion of this land. Their leader was called Reoda, from whom they are named Dalreodi.

For all its flaws, its nearly 100,000 words are, in many cases, the only human viewpoint we have on certain centuries. Also, its status in literature is assured as "the first continuous history written by Europeans in their own language."

The Assize of Arms

In the early Middle Ages, Britain was a collection of territories, each with its own leader(s), which formed a loose confederacy at times of national trouble. When William of Normandy conquered in 1066, he put the whole land under one rule, maintained by his lieutenants and supporters in positions of authority over chunks of real estate. This was the start of the feudal system.

While the king might keep troops near him, there was for a long time no standing army that could be applied immediately to a military conflict. In the 11th and 12th centuries, countries in Western Europe still relied on raising armies by calling for volunteers and paying men to fight. Often these men came from other lands. After Henry II had to put down a 1373-4 rebellion by bringing in Brabançon soldiers, and seeing the distrust of his English subjects for their presence—not to mention their dislike of the extra taxes required to pay for the king's mercenaries—he created the Assize of Arms in 1181.

The purpose of the Assize was to make certain there would be sufficient local military support for a campaign. It outlined the responsibilities of his subjects to have the proper arms and armor and to bring them when called upon. Some of its 12 provisions were:

1. Each knight must have a hauberk (armor covering at least neck and shoulders), helmet, shield and lance.
2. Each freeman (worth at least 16 marks) must have hauberk, helmet, shield and lance. Each freeman of 10 marks worth must have a light hauberk, iron cap and lance.
4. Every man must swear an oath that they will have these arms and carry them for King Henry.
5. If you die, your arms go to your son; if he is too young, his guardian must use them or find a suitable person until the son comes of age.
7. No Jew should have arms, but should sell them to someone who can use them in the king's service.
8. No one may sell, trade, or carry away these arms so that they leave England.
10. If any man does not have arms in accordance with this order, the king shall take not only his goods and land, but also his life and limbs.

The Assize enabled Henry II and his successors to save themselves the cost of maintaining a standing army. Moreover, an army could be called up and assembled within a matter of days with requiring extraordinary taxation. It was very useful for King Henry two years later, when he had to go to war against a rebellion by his son and heir, King Henry.

But that's a story for another day.

Before Marco, There was William

Everyone's heard of Marco Polo (1254-1324) and his travels with his Venetian uncles to the Far East. He was not alone, however, in leaving Europe on long journeys to strange lands.

The most detailed early account of life in Asia was written by a Flemish Franciscan monk named William Rubruck (Willem van Ruysbroeck, c.1210-1270). While on crusade with King Louis IX of France, in Palestine he met a Dominican sent by the pope to enlist the Mongols' aid against the Muslims. Rubruck decided he would try to convert the Mongols to Christianity.

Rubruck's Travels

He set out in 1253 on a round-trip journey that took him three years, traveling as far as the Mongol capital of Karakoram; he was the first European ever to visit it—that is, who also returned to write about it. His personal mission gave him the opportunity to write about what he saw and the ethnicities and religions and customs he observed.

It is interesting that, as he traveled, he often found other Europeans who recognized his Order because of his clothing. He was also questioned frequently about his "version" of Christianity. He met several Christians and Christian priests who were Nestorians. Nestorius (386-451) was a patriarch of Constantinople who claimed Jesus had two distinct natures: a human nature and a completely divine nature, referred to as Logos. These two natures, or essences, are connected but unmingled. When Nestorianism was condemned in 431 at the Council of Ephesus, the Assyrian Church refused to change their support for it. Rubruck had his work cut out for him: preaching Christianity, and preaching against the local Christianity.

There's more to say about Rubruck, but I'll leave off for today with a simple thought: if he had become more famous than the other guy, would there be a game now where people called out "William!" "Rubruck!"

Richard II's Feast

In 1390, King Richard II of England had his master chefs assemble a book of all their best recipes. This Forme of Cury (Forms of Cooking) was interesting enough that an edition was presented to Queen Elizabeth I. In 1975, Lorna J. Sass took the edition printed for the Early English Text Society* recipes and not only translated the recipes into Modern English (to the best of her understanding, given the imprecision of the directions), but also tested the recipes to determine proportions of ingredients that would result in dishes acceptable to the modern palate.

You can read it yourself one photographed manuscript page at a time here. The illustration on this page is for "Conynges (conies=rabbits) in clere broth." You can see the title clearly.

On September 23, 1387, Richard held a feast, the details of which are given. The pomp and ceremony started at 10:30, followed by:

• Venison with furmenty (a sauce of boiled wheat)
• A potage called Viaundbruse (a broth with choice meats)
• Heads of Boars
• Great haunches of roasted meat
• Roasted swans
• Roasted pigs
• Custard with dried fruit, parsley and bone marrow in a crust
• A subtlety (a decorative piece of food)

...and that was the first course. Eleven more dishes followed—mostly meats—and then a subtlety. Then a third course of ten more dishes, and a subtlety. When this was all done, the sun was beginning to fade. Wafers and spiced wine were served, and spiced confections placed on the tables.

That was a feast!


*The EETS was founded in 1864 by F.J.Furnivall with the stated goal of putting into print all historical manuscripts available in English. It is through the EETS that many manuscripts from the Cotton Library became available to scholars and the public.

More than a Musician

We so often study famous people in isolation, forgetting that their lives and successes probably overlapped other well-known people. Imagine the possibilities when people of vision and ingenuity met with and influence each other?

Philippe de Vitry (1291-1361) is not a well-known name today, but in his lifetime he was acknowledged as the greatest musician of the age, and his own works and his connections with others are worth knowing. In his lifetime, he was a diplomat, a soldier, a poet, a composer and music theorist. Like most university-educated men of the Middle Ages, de Vitry was in Holy Orders and held several clerical positions, finally being appointed Bishop of Meaux by Pope Clement VI.

Some of the motets he composed have survived. His chief contribution to music, however, was in the evolving system of notation. In Ars nova notandi (Art of the new notation), de Vitry improved on Franconian musical notation that had been set out in Franco of Cologne's Ars Cantus Mensurabilis (The Art of Measurement of Songs); de Vitry recognized the existence and importance of duple and triple meter. For connoisseurs of music:

In the treatise Vitry recognizes the existence of five note values (duplex longa, longa, brevis, semibrevis, and minima), codifies a system of binary as well as ternary mensuration at four levels (maximodus, modus, tempus, prolatio), and introduces four time signatures. He also discusses the use of red notes to signal both changes of mensural meaning and deviations from an original cantus firmus. (source)

And of course he knew other accomplished figures of his age, such as Petrarch, Nicholas Oresme, and Gersonides. In fact, de Vitry's musical approach to mathematics (the two subjects were closely linked in medieval education) prompted him to request of Gersonides a work to prove a theory. This 1342 work, De harmonicis numeris (On the harmony of numbers), maintained that, "except for the pairs 1-2, 2-3, 3-4, and 8-9, it is impossible for two numbers that follow each other to be composed of the factors 2 and 3." (source) The result is known today as the Theorem of Gersonides.

How far are the stars?

Rabbi Levi ben Gerson, also known as Gersonides, lived from 1288-c.1344. He was from a family of scholars: his father, Gerson ben Solomon of Arles, was the author of the Sha'ar ha-Shamayim, an encyclopedia of natural science, astronomy, and metaphysics.* Levi is credited with first mentioning, and possibility inventing, Jacob's Staff. (He references Genesis 32:10 when he describes the device; this is likely the origin of the name.)

At a time when religion, philosophy, astronomy, astrology and science were overlapping (and in some cases, interchangeable), Gersonides' greatest work, which was philosophical, contained his greatest contribution to astronomy. He put twelve years (1317-28) of effort into the Milhamot Adonai ("Wars of the Lord"), whose six books dealt with 1) the soul, 2) prophecy, 3) & 4) god's knowledge of facts and providence, 5) astronomy/astrology, and 6) creation and miracles. Gersonides firmly accepted astrology and the celestial hierarchy of powers inherited from neo-Platonists and pseudo-Dionysius (far too complex to go into here), but he also brought mathematics and observation to his work with extraordinary results for the time.

Postage stamp honoring Gersonides.

Gersonides rejected the Ptolemaic system of epicycles to explain the erratic motion of planets affixed to their crystal spheres surrounding the Earth. According to Ptolemy, epicycles explained the changing size of planets; he said, however, that Mars varies by a factor of six; Gersonides' observations told him that Mars's apparent size varies only two-fold. Gersonides used the Jacob Staff and a camera obscura (pinhole camera) to make careful observations over several years. For Gersonides, 48 crystalline spheres were needed to explain the apparent motion of various heavenly bodies. This expansion of the "physics" of the Ptolemaic model was nothing, however, compared to the actual physical expansion he proposed.

Careful observation with the Jacob Staff, the camera obscura, and math made Gersonides declare heavenly objects to be much farther away than previously calculated. Ptolemy claimed the distance to Venus was 1079 Earth radii; Gersonides estimated it to be 8,971,112 Earth radii away. Ptolemy said the fixed stars were 20,000 Earth radii away; Gersonides estimated them to be at a distance 10 billion times greater.

Pope Clement VI had the "Wars of the Lord" translated into Latin in 1344, making it available to the west. Its impact was minimal, however; we know of a few scholars who were influenced by it, and Kepler asked a friend to send him a copy in the 17th century. But it took Copernicus two centuries later to "confirm" to Western civilization's satisfaction that Gersonides was on the right track.

*As I have mentioned about medieval encyclopediæ before, they were often compilations of previous works; this one drew from Claudius Ptolemy's Almagest and the Morah Nebukim, or "Guide for the Perplexed" of Maimonides. A 1547 edition of ben Solomon's work can be had from Kestenbaum & Company.

Muslim-Christian Relations, Part 2 (of 2)

[Part 1 is here.]

Saladin

After Richard and Saladin each slaughtered their prisoners, Richard marched to Jaffa, which he hoped to make a base from which he could take Jerusalem. Saladin attacked, but Richard prevailed with his main troops in the front and the Knights Templar forces on the left and the Knights Hospitaller on the right. Saladin was surrounded on three sides. Richard took Jaffa in September 1191, and Saladin was willing to talk truce.

Richard and Saladin showed great mutual respect for each other's military prowess. A temporary halt to hostilities was declared so they could come to terms.  At one point, when Richard became ill, Saladin sent him fruit that was chilled with snow brought from the mountains, and offered his personal physician. Also, Saladin sent two horses as replacements for Richard's.

An attempt was made to join East and West by the marriage of Richard's sister, Joan (1165-1199), to Saladin's brother, Al-Adil (1145-1218), who was currently administrator of Egypt. Joan had been married to King William II of Sicily, but he had died in 1189; later she would become Countess of Toulouse by her marriage to Raymond VI. The plan was for Jerusalem to be their wedding gift, and would therefore pass into the hands of a dynasty that joined Western Europe (or, at least, England!) to the Muslim world. Negotiations fell through, however.

The two commanders did agree on a three-year truce. In summer 1192, the Treaty of Ramla determined that Jerusalem would remain under Muslim control, but Christians would be allowed safe passage. Also, the Crusaders would give up lands they had invaded except for a narrow coastal strip that extended from Tyre to Jaffa. Neither leader was wholly pleased, but each had reason to wish a swift end to the conflict. Richard had troubles at home due to his brother John. Saladin was losing control of his army because of his failure to re-take Acre or to route Richard's forces in their many engagements.

Saladin died of yellow fever in 1193. While his heirs fought over the succession, Western Europe was told tales of Saladin's military prowess and chivalrous actions toward the invaders. There is an anecdote that, in April 1191, a Frankish woman on pilgrimage had her baby stolen and sold into slavery. According to Saladin's biographer, Saladin bought the baby back with his own money and returned it to the mother, then ordered a horse to take her back to her camp. Poems were written in praise of him. Richard declared him the greatest leader in the Islamic world.

And the punchline? All the negotiations and gifts between Richard and Saladin were made by proxies. The two men who so praised and respected each other never met face-to-face.

Muslim-Christian Relations, Part 1 (of 2)

The Second Crusade (1145-49) had put a great deal of the Holy Land under European rule, but Saladin (Salah ad-Din Yusuf ibn Ayyub, 1138-1193) had re-conquered much of that territory, prompting several kings of Europe to agree to another crusade. The Third Crusade (1189-92) was unsuccessful in putting the Holy Land under Western European control. It did, however, open up a dialogue between the east and west in unforeseen ways.

The death of Henry II put the English troops under the command of Richard the Lionhearted. Richard loved military campaigns. His first stop was at Cyprus to conquer that island, after which he joined King Philip of France and Leopold V of Austria, who were embroiled in the two-year-long Siege of Acre. Richard's siege machines started destroying the walls. The residents of Acre sent appeals to Saladin to help them, but he could not defeat the Europeans. Acre had no choice but to surrender. Five weeks after Richard's arrival, the Europeans took the city, and banners were raised over the city representing the Kingdoms of Jerusalem, France, England, and the Duchy of Austria.

Richard may have been a great commander, but he was a terrible co-commander. The three lords fought over the disbursement of the spoils of war. Richard argued against the other two over whom should be left as King of Jerusalem; Richard prevailed. Richard also refused to accord Leopold the same respect as a king, and took down Austria's banner. In August, Philip and Leopold had had enough: they went back home, leaving 10,000 French troops with Richard's army.

Richard alone was left to deal with Saladin and establish a treaty after Acre. Payments of money and the transfer of Muslim and Christian prisoners were arranged. Richard did not like the slowness of the payments, and the fact that he wanted more Christians handed over faster. He had 2700 Muslim men, women and children of Acre killed outside the walls. Saladin, not to be outdone, killed all the Christians in his possession.

But the relationship between these two commanders was going to take an odd turn.

[to be continued]

Jacob's Staff

Have you seen a modern surveyor using a single vertical rod with an instrument on top to measure property lines? That pole is nicknamed a "Jacob's Staff." Hundreds of years ago, however, the term "Jacob's Staff" was used to refer to more than one type of instrument; it's the other instrument that I want to discuss today.

A recreation of a Jacob's Staff.

The other instrument was also called a cross-staff, or a fore-staff, or (around the Mediterranean) a balestilha. It comprised a staff with cross-pieces designed to allow the user to determine angles of distant points. By aligning it with, say, Polaris (the North Star), a sailor could determine the angle between the star and the horizon. Matched against known measurements, the sailor then knew his latitude.

Knowledge of geometry and arithmetic also allowed the user to determine other measurements. If the height of a distant tower were known, that number and the angle known via the staff allowed you to determine your distance from the tower. Alternately, if you knew your distance from the base of a tall object, finding the angle from you to the top of it helped you determine how tall it was.

The Jacob's Staff had another name as well when used with heavenly bodies: radius astronomicus.

From an early book on navigation.

Where did it come from? The earliest description we have of the device is in the astronomical works of Gersonides (Levi ben Gerson, 1288-1344), who describes it as:

... a staff of 4.5 feet (1.4 m) long and about one inch (2.5 cm) wide, with six or seven perforated tablets which could slide along the staff, each tablet being an integral fraction of the staff length to facilitate calculation, used to measure the distance between stars or planets, and the altitudes and diameters of the Sun, Moon and stars. (Book of the Wars of the Lord)

Although some ascribe it to a contemporary of his, an astronomer named Jacob ben Machir (1236-1304). This might also explain its common name, since no other convincing etymology has come forth. The invention of the more precise sextant in the 18th century rendered the Jacob's Staff a quaint relic, and the name, when used, came to refer only to the simpler measuring stick we still see today.

Defenestration

After Jan Hus was executed for heresy in 1415 (Jan Hus has been discussed here and here), his followers, called Hussites, continued to protest vehemently for the reform of the Church. A very popular Hussite priest of the church of the Virgin Mary of the Snows, Jan Zelivsky, led a procession to the Town Hall in Prague that gathered a large number of citizens. The protest was about the inequality between peasants and the nobility, and about the perceived corruption of the Church that had been successfully preached by Wycliffe. Preachers such as Zelivsky urged people to take up arms to combat their oppression.

After the procession reached Charles Square in the city, someone threw a stone at Zelivsky from a window of the Town Hall. This act caused his followers to enter the building en masse, seize the judge, the burgomaster (the Mayor of Prague), and thirteen members of the town council, and throw them all out a window. Those that did not die in the fall were finished off by the crowd.

This was called the Defenestration of Prague, from the Latin defenestrare, "to throw out a window."* Over a century later, it would be re-named "The First Defenestration of Prague," because the act was so useful that it became a pastime.

Later depiction of a Prague defenestration.

The Catholic Encyclopedia would have you believe that this event so disturbed King Wenceslas IV that he died shortly after due to shock. Perhaps someone should update that page. Wenceslas died over two weeks later, after suffering a heart attack while hunting in the woods around his castle. He had been sympathetic to non-conformists and to the idea of reform, and had been a supporter of Jan Hus. The Defenestration surely would not have pleased him, but a king in his 50s who had seen what Wenceslas had been through was used to controversy. Sadly, his death along with the Prague violence helped kick off the Hussite Wars.

The Defenestration of Prague took place 593 years ago today, in 1419. Consider how you might honor the event as you go through your day!


*Let us pause and reflect on the utility of Latin, to already have a word for this act! It was needed at least for the Latin Bible, so that Jezebel could be defenestrated in 2 Kings 9:33.

Thorkill of Arden

When Leofric, Earl of Mercia, died in 1057, his estate of Kingsbury passed to his widow, the Countess Godgifu, better known to later generations by the Latin version of her name, Godiva. The Domesday Book, compiled on King William's orders in 1086, lists her as a landowner as of the Conquest in 1066, but no longer. So where did her property go?

Prior to William of Normandy's attack in 1066, Edward the Confessor had been inviting Normans over the Channel as councilors; several of them had already been given lands. After 1066, Normans were put into all positions of power, and Saxon nobles were demoted to lesser landholders. Two Saxons, however, had chosen to support William in 1066. One of these was Thorkill of Arden (also called Turchill).

Early Heraldry for Arden

Thorkill's father, Æthelwine, was a nephew of Leofric and the Sheriff of Warwickshire in 1066. Perhaps Thorkill saw supporting William as a way to enhance his own standing. Perhaps he truly believed that William was the rightful ruler; reasons why he might were discussed here. Perhaps he just didn't like Harold. In any case, he was confirmed as Sheriff after his father's death.

At some point—the simplest explanation is the death of the Countess Godiva, whose date we do not know—King William gave Kingsbury and its 700 acres to Thorkill. This made Thorkill the sole member of the pre-1066 Saxon nobility to hold an estate of any significance at the time of Domesday.*

Thorkill held Kingsbury for several years; he is listed as the landowner in Domesday. King William's third son was crowned William II on 26 September, 1087 by Bishop Lanfranc. William II was in many ways a successful king, although not universally popular; perhaps confiscating people's lands had a role. William took Kingsbury away from Thorkill. That was not the end of the Arden family's prosperity, however: they remained prominent in Warwickshire politics. A descendant, Mary Arden, was the mother of Shakespeare.

*That is, of the nobility; Bishop Wulfstan of Worcester was, technically, the most powerful Englishman in 1086.

Leofric

Remember Edward the Confessor? He may have had good qualities, but getting along with family was not one of them. Not only was he harsh to his mother, he quarreled frequently with his father-in-law, Godwin, who happened to be one of the most powerful men in England. One of the quarrels between the two was "mediated" by Leofric, Earl of Mercia (d.1057).

King Cnut (c.985-1035) divided England into four provinces (East Anglia, Mercia, Northumbria, and Wesex) and gave each to an earl. The earldom of Mercia was given to Leofric after its original earl,  Eadric Streona, died in 1017 (within months of Cnut's division). The position meant Leofric was second in power to Godwin of Wessex.

When Cnut died, Leofric supported as his successor Harold Harefoot over Harthacnut. Harold was the son of Cnut's first wife, Ælfgifu, and Leofric may have been related to her. Harold became king, but when he died in 1040 and Harthacnut ascended the throne, Leofric must have felt a little awkward. Fortunately for Leofric, Harthacnut died in 1042, and his half-brother Edward the Confessor took the throne.

When Edward and Godwin quarreled in 1051, Leofric brought an army, along with Earl Siward of Northumbria, and joined Edward's troops in facing Godwin's forces. Leofric counseled that they should settle the conflict peacefully rather than risk destroying the fighting power of England. The result was Godwin's (brief) exile.

Life was good for Leofric, and his son Ælfgar replaced Godwin as Earl of Wessex; but Godwin and Edward were reconciled a year later, and Ælfgar had the humiliation of losing his earldom. In 1053, when Godwin died, Ælfgar got the position back again. Ælfgar seemed to follow in the footsteps of his predecessor, not his father, and was exiled in 1055, whereupon he raised a fleet and tried to attack England. But that's a different story.

Talk about a different story: I've left out one tidbit about Leofric—the one everyone knows, although they don't know they know it. Leofric and his wife, Godgifu (Anglo-Saxon for "god gift"), were very devout people. They endowed a Benedictine monastery in Coventry, and later records credit them with supporting monasteries at Chester, Evesham, Leominster and Much Wenlock. Some later writers claim she was the primary influence for her husband's generosity. In fact, there is a story (without evidence) that she was so opposed to the oppressive taxation imposed by her husband on his tenants, that she was willing to go through an 11th century version of "truth or dare." What we know of her husband suggests that not only would he not have been so cruel to his tenants, but neither would he force his pretty young wife to shame herself by riding naked through the streets of Coventry. Still, the story won't go away, although Godgifu probably wouldn't recognize either the telling or the Latinized version of her name, Godiva.

Domesday Book

In 1085, Duke William of Normandy had been ruling England as King William for twenty years (it all started here). He decided it was finally time to take inventory of his property. He sent his agents (3-4 commissioners for each of 7 areas the country was divided into) to make a survey of everything south of the border with Scotland.* They met with groups of representatives (barons and villagers) and asked a series of standard questions. By the end of summer in 1086, the reports (in Latin) were all being compiled back at Winchester, along with data on the value of the land and its assets immediately pre- and post-Conquest. The entire work is in the same very neat handwriting, so a single scribe was given the job of compiling/collating everything. The official name of the result was "The Book of Winchester."

So why is it usually called "Domesday Book" now? That nickname was given to it about 100 years later, and just like it looks, it means "Doomsday." The idea behind the nickname is that the book was such a complete listing of everything in England that it was equivalent to the "Book of Life" used by God at the end of time to judge your deeds. It was that complete.

Except, of course, it wasn't.

For one thing, work ceased by the time King William died in September 1087. The section on East Anglia hadn't been compiled into the total work. There is, therefore, a "Little Domesday Book" with the East Anglia data. Also, important cities such as London and Winchester were not included, probably because William figured he knew them well enough and didn't need an accurate accounting of their property assets, such as he would want for the countryside.

Also, attempts to judge population using Domesday fall short of expectations. Although farms and buildings were counted, only heads of households were included in the population count. In castles, the number of men were counted, but the population in monasteries and convents was not. Best guesses, extrapolating from what data are included, is a population of 1.25-2 million, a far cry from the estimated 4 million during the Roman occupation.

Still, the Book contains a lot of fascinating information in its 413 pages, which I will draw on in the future.


*N.B.: The border with Scotland was much farther south than it is now.

Updates

My research (or just day-to-day life) sometimes bring me details that I wish I'd known when I wrote a certain blog post, or that I think are interesting tidbits that tie into posts. Occasionally, I will throw these updates together with links to the originals.

May 19
The Domus Conversorum, the "House of Converts" in London for Jews who converted to Christianity (or else be banished from England). A picture of what is on the modern site is here. (The photographer's caption is a little misleading.)
Also, there was a building called "Domus Conversorum" in Oxford, and for awhile it was thought that Oxford (which had a large Jewish population pre-Expulsion) had its own Converts' Inn. It is accepted now, however, that the property was called thus because the rents from it went to supporting the Domus in London.

July 2, 3, and 5
John Wycliffe was a fascinating character for many reasons, but I may have been remiss in "finishing him off" by not giving you the whole story (one of this blog's followers commented on this on Facebook).
Wycliffe died 31 December, 1384, after suffering a stroke a few days earlier while saying Mass. It wasn't until 4 May 1415 that the Council of Constance declared him a heretic (prior to this, only some of his writings were proscribed). His books were to be gathered and destroyed. The Church—never one to do things by halves when defending the faith was involved—exhumed his body in 1428, burned it, and scattered the ashes in the nearby River Swift near Lutterworth.

July 21
Update on the Greenland/Medieval Warm Period topic
Just this week it was reported that satellites have seen a sudden and massive melting of the ice on Greenland. The specific/immediate cause is unknown. This may make archaeological digs for Erik the Red's settlements easier to examine. The report is here.

(Also, I want to say "hi" to any visitors from reddit.com. Yesterday saw a large influx of visitors from that site to yesterday's post on vocabulary first found in Chaucer's writings. Thanks for visiting anc creating a pleasant spike in my site traffic!)

Words from Chaucer

Geoffrey Chaucer (c.1342-1400) and William Shakespeare (1564-1616) are both credited with increasing English vocabulary. There is no proof that either of them actually invented the words we find in their works. All we can say for certain is that the words appeared for the first time in their works; it is likely that many of these words were in common use on the streets of London.

While Shakespeare is usually the first to come to mind when the subject of contributions to the English language comes up, Chaucer actually gets credit for having more words we know now appear in his works first. Of course, since he had a two-century head start on Shakespeare, maybe it isn't a fair contest.

Chaucer gets the credit if you can:

check the galaxy called Milky Way
bear a corrosive test
observe an oriental Persian
foster a superlative rumour
clasp a dagger
be victorious
varnish a convertible
muse on femininity
amble the equator
preen, murmur, vomit, fart, strangle, commit, retain, oppress, create a mystery, or replenish material.

John of Gaddesden

With us there was a doctor of physic;
In all this world was none like him to pick
For talk of medicine and surgery;
For he was grounded in astronomy. —Prologue to the Canterbury Tales

Doctor, from the Ellesmere MS.

John of Gaddesden (c.1280-1361) was a "Doctor of Physik" who was quite well-known in his day, so much so that modern scholars looking to find analogs for the characters in Chaucer's Canterbury Tales have suggested he is the likeliest candidate for Chaucer's "doctor of physic." As a fan of both Chaucer and historical detail, I'm going to weigh in and say . . . maybe.

Who was Gaddesden, and why was he considered the model for Chaucer's pilgrim? For one thing, he had written Rosa medicinæ (The rose of medicine; sometimes called the Rosa Anglicæ), a compendium of medical information called so because it was in five parts, like the five sepals of a rose. In it, he quotes numerous authorities from the past; Chaucer's list of authorities with whom his doctor is familiar lines up nicely with Gaddesden's sources. Also, Gaddesden had a reputation for charging high fees, and Chaucer makes it clear that his doctor loved gold.

To be honest, however, Gaddesden's book was quoting the same authorities that anyone would quote when compiling a book on medicine. It was completely unoriginal. Even his title seems derivative, probably based on Lilium medicinæ (the Lily of medicine) by Bernard Gordon, produced at Montpellier in 1303. Gordon, a Scotsman, was one of the teachers of Guy de Chauliac. Chauliac, in turn, taught Gaddesden. What did Chauliac think of his student's work? Not much; he said of it:

Last of all arose the scentless rose of England, in which, on its being sent to me, I hoped to find the odor of sweet originality, but instead of that I encountered only the fictions of Hispanus, of Gilbert, and of Theodoric.

Those who write about Gaddesden being Chaucer's doctor usually justify it also be calling them "contemporaries." Let's look at the timeline: the Canterbury Tales probably wasn't started until 1387. Even if the Prologue were the first thing he wrote—highly unlikely—this was a quarter century after Gaddesden's death; a death that would have taken place when Chaucer was about 20 years old and had been connected to the household of Prince Lionel, the second son of King Edward III, only for a few years. Gaddesden seems to have been attached to the household of Edward, the Black Prince, who would have spent much of Gaddesden's later years on the continent while Chaucer was in England.

They could have crossed paths, but probably not significantly, and Gaddesden would have been long out of the public eye and consciousness when Chaucer came into his own as a poet. For Chaucer to write up a physician who quoted historical authorities, knew astrology, and loved gold probably just meant that he had met typical physicians.

Great Surgeon

The history of medicine includes many brave and progressive thinkers who were not willing to follow the herd or be content with what was already known. One such in the Middle Ages was Guy de Chauliac. Born about 1300, he studied at a university in Montpellier known for its expertise in medicine. After becoming a Master of Medicine and Surgery around 1325, he went to Bologna for further study. His reputation became such that he was invited to Avignon to be personal physician to Pope Clement VI, then Pope Innocent VI and Pope Urban V. The papal connection gave him access to a library that included the texts of the Greek physician Galen in their original; most of Europe knew Galen through less accurate Latin translations.

He possibly saved Clement's life during the spread of the Black Death, when he advised the pope to stay near blazing fires. Although many physicians fled Avignon at the arrival of the Plague, Chauliac stayed to study the disease and treat people. He determined that it was contagious, but couldn't figure out the method of contagion. Still, he advised bloodletting, a healthy diet, and exposure to pure air (hence the fires, which would have serendipitously served to keep fleas away). He also realized that there were two diseases involved because of different sets of symptoms: the initial Bubonic Plague, and the follow-up Pneumonic Plague which found its foothold in the weakened population and killed much more swiftly. Chauliac spoke out strongly against those who blamed the Jews for the Plague, explaining that scientifically it made no sense to consider them at fault.

Tools for withdrawing an arrow.

His value to the rest of the world and history was the writing of Chirurgia magna (Great [book of] Surgery) in 1363. Its seven volumes covered every imaginable medical topic of the day: intubation, surgery, disease, anesthesia, hernia, cataracts, ulcers, bloodletting, cauterization of wounds, and the use of special instruments (some of which he designed himself, such as an elaborate contraption for withdrawing an arrow from flesh). Chauliac drew on the past, quoting Galen (129-c.200) and Avicenna (Abu Ali al-Husayn ibn Abd Allah ibn Sina, c.980-1037). He placed great emphasis on learning anatomy, saying that "A surgeon who does not know his anatomy is like a blind man carving a log."

Chauliac was not always accurate. He believed, for instance, that pus was an important part of the healing process and should be left alone. Nevertheless, his Chirurgia became a standard text for the next three centuries, translated into several European languages. Unfortunately for future generations, anti-Islam sentiment caused many translators to leave out knowledge from Islamic scholars, resulting in a less complete and less accurate work. Still, he has been labeled the "Father of Modern Surgery," and his great work was the standard text until the 17th century.

Medieval Re-Births

Far from being a complete intellectual vacuum in the years between the decline of Rome and the Renaissance, Europe experienced three distinct periods when the slow slog of culture enjoyed a short sprint forward. Two of them were connected specifically with royal patronage and the attempt on the part of a ruler to create something academically impressive and politically lasting. Scholars dispute the accuracy of calling them "renaissances" because their impact was not as lasting as the shifts in the 14th century that sparked an uninterrupted (so far) progression in all human endeavors. Erwin Panofsky, a 20th century German art historian, produced a slim tome in 1944 called Renaissance and Renascences in which he used the latter term to distinguish those other periods in history. Let's do that.

Charlemagne

The first Renascence took place during the reigns of Charlemagne (c.742-814) and his son, Louis the Pious (778-840). Charlemagne was not only King of the Franks. He managed to unite much of western and central Europe, and once he conquered Italy, he was in a position to be named Holy Roman Emperor.

Empires require a great deal of bureaucracy, however, and the dearth of literate men to serve as court scribes and secretaries was problematic. Literacy was also a problem because many parish priests could not read the Bible. In fact, the lack of widespread formal training in Latin meant that its common use—what now is referred to as vulgar Latin—was developing into regional dialects. Some of these dialects would evolve into what we call the Romance languages.

Sample of Carolingian Minuscule

With the chance to re-create the glory that was the Roman Empire, Charlemagne gathered scholars to promote the proper use of Latin. While establishing schools to accomplish this and—and along the way developing a new script called "Carolingian minuscule" that was more legible than what came before—he promoted learning, art, law, architecture, and Christianity. In order to do this, he brought together many top scholars of the day, such as:

• Peter of Pisa, who taught Charlemagne Latin
• Paulinus of Aquileia
• Paulus Diaconus
• Alcuin of York
• Joseph Scottus

These men and others helped to create a "bright spot" in a time so often called "dark." There were still dark times to come in western Europe, but thanks to the Carolingian Renascence, Western Civilization survived—in the words of Sir Kenneth Clark in his epic Civilization: "by the skin of its teeth."

Medieval Warm Period

The Medieval Warm Period (MWP) existed from 950/1000 to 1200/1250 CE (estimates vary because of the difficulty in collecting accurate data and the desire to allow some leeway for natural change in climate trends). It was followed by cooler temperatures and something called the Little Ice Age (LIA) which lasted from about 1500 until about 1850. (The span is also referred to as the Medieval Climate Anomaly, if you want to Google it.)
Some medieval records indicate weather (drought years, particularly bad storms, et cetera), but they didn't have the organizational longevity (or the interest) to record long-term climate trends. Besides tree rings and ice cores, is there any "anecdotal" evidence from the Middle Ages itself that suggests long-term changes in average temperature?

Erik the Red

Let us look at Erik Thorvaldsson (950-c.1003), aka Erik the Red. Erik's father wasn't the most easygoing guy, and was exiled from Norway, whereupon he took his family to Iceland. Around 982, Erik himself got into trouble for killing some people (poor anger management was apparently a family issue). He sailed from Iceland to Greenland, where legend says he created the first settlement. It is likely that there was already a Norse presence, but Erik can probably claim credit for the first permanent habitation.

If we can believe the sagas and records, then even though life was very harsh, in the 1120s there were sustainable settlements on the eastern shore that held 2000-4000 people. One modern scholar reports "190 small farms, 12 parish churches, a cathedral, an Augustinian monastery, and a Benedictine nunnery." On the western shore were "90 farms and four churches."

Why the Norse settlements ultimately failed is a target for speculation–one theory is that rising amounts of sea ice made navigation, and therefore trade that was necessary to keep their society going, difficult–but here's the thing: excavations of those early settlements have found quite a bit of evidence of their way of life—but they have to dig under "permanently" frozen ground to do so.

It is clear that those settlements existed—could only exist—at a time that was significantly warmer than Greenland's climate is today.

Mirrors for Princes

Machiavelli's Il Principe (c.1513) was far from innovative. Writers since classical times had produced works that explained the proper behavior—or improper behavior—of rulers. The genre was called specula principum, or "mirrors for princes." These took the form of instruction books, often aimed at a young ruler who was just coming into power, or could be biographies of rulers who should (or should not) be emulated.

The reign of Charlemagne seems to have motivated the desire to "raise the bar" for rulers and inspired many writers to produce mirrors for their local rulers in the 9th century. Charlemagne's life was, of course, the example to be followed as far as Einhard's Vita Karolini (Life of Charles) was concerned. No one wanted to see the Carolingian empire suffer after Charlemagne's demise, and so his descendants had no lack of advice. His son Louis the Pious was the target of one speculum by Smaragdus of Saint-Mihiel; Louis' son Pepin I of Aquitaine was the target of one by Jonas of Orléans; Louis' grandson Lothair II of Lotharingia was addressed by Sedulius Scottus in a work called "On Christian Rulers."

Alcuin of York, a prolific writer and famous teacher, wrote De virtutibus et vitiis (On virtues and vices, c.799) for Count Wido of Brittany. A friend of Alcuin's, whom he met at Charlemagne's school in Aachen, was Paulinus of Aquileia who wrote the Liber exhortationis (Book of exhortations, 795), for Count Heiric (Eric) of Friuli. Paulinus (c.730-802) had been born in the Friuli region of northeast Italy and he and Heiric were friends, so he felt entitled to tell Heiric a thing or two, including advising him to free his slaves. (Having slaves was common.) Paulinus also wrote an elegy when Heiric was killed in 799.

Mirrors for princes were popular right through the Renaissance by scholars who felt qualified to give advice to powerful men. We know of ones that were written for the future Henry VIII (by John Skelton; a copy exists in the British Museum), for King Charles V of Spain (1516, by Erasmus), for King Christian IV of Denmark-Norway (1597, by Johann Damgaard), and King James I of England wrote one for his eldest son, Henry, who died of typhoid at 18; maybe Charles I read it when he ascended the throne.

Medieval Acrostics

The simplest form of acrostic is a poem or other writing in which the first letter of each line spells out a word (presumably on that is related thematically to the writing). They are frequently used in education today because they are fun, but 2000 years ago they were considered valuable learning tools because of their embedded layers of meaning, especially the type of acrostic called carmina figurata ("shape poem"); it could either be a poem with words constrained to a shape such as a chalice or dragon, or it was designed so that various letters could be highlighted to make shapes or focus the reader on certain words or names.

This practice had been elevated to a high art by Roman poets. The sample on this page is from Publilius Optatianus Porphyrius, who was writing to please the Emperor Constantine in order that Optatianus might be recalled from exile. Optatianus is credited with inventing this type of carmina figurata, where the shapes to be found are internal to the poem, which is written out as a block (or other symmetrical shape) of text to aid in finding the lines. You can see not only the chi-ro symbol, but the name "iesus" spelled around the outside of the square. An interesting scholarly examination of Optatianus' figure poems can be found here.

But away from the 4th and back to the 8th century: as part of Alcuin's academic push, he gave various assignments to the men working with him at Charlemagne's palace school at Aachen. One of the men working with him was Joseph Scottus.

We know almost nothing about Scottus outside of his connection with Alcuin. He was Irish, and probably studied at the monastery in Clommacnoise. It is assumed that at one point he studied under Alcuin at York, and that connection drew him to the Frankish court when Alcuin took over. Despite his background and anti-Irish sentiment at the time, he was on very friendly terms with Charlemagne, and Scottus took over for Alcuin in 790 when Alcuin had business back home.

Very little writing by Joseph has survived, most of which is acrostics. Alcuin apparently tried to revive the form, and a manuscript of acrostics exists in Switzerland that clearly came from Charlemagne's school: the majority of acrostics are by Joseph Scottus, with others by Alcuin himself and Bishop Theodulf of Orléans. (Alas, I can find no pictures of the manuscript to share!)

A Note on Ireland

Anti-Irish sentiment has a long heritage. In the Middle Ages, Ireland was a target of Western Europe disdain for at least two reasons.

16th century map of Ireland.

Gerald of Wales (c.1146-c.1223), a royal clerk under King Henry II, accompanied Henry's son John to travel to Ireland in 1185. Gerald praised the land, but condemned the people:

They use their fields mostly for pasture. Little is cultivated and even less is sown. The problem here is not the quality of the soil but rather the lack of industry on the part of those who should cultivate it. This laziness means that the different types of minerals with which hidden veins of the earth are full are neither mined nor exploited in any way. They do not devote themselves to the manufacture of flax or wool, nor to the practice of any mechanical or mercantile act. Dedicated only to leisure and laziness, this is a truly barbarous people. They depend on their livelihood for animals and they live like animals.

This could have been an accurate account of what he saw, but could just as easily have been intended to provide justification for Henry's conquest of Ireland in order to gain for himself and his sons more lands and resources. Pope Adrian IV (the first Englishman to sit the Throne of Peter) had written a papal bull in 1155 called Laudabiliter;* it gave Henry permission to assume control over Ireland and apply Gregorian reforms.

...and that was the second reason for anti-Irish sentiment: Ireland needed to be brought into line doctrinally with the Roman Catholic Church. Catholic missions to Ireland (notably that of the Scotsman, St. Patrick) had introduced Christianity centuries before this. Christianity had survived in Ireland while it suffered in Britain due to invasion from Northern European pagan groups. But the Christianity restored in Britain afterward was closely tied to Rome, while Christianity in Ireland had developed its own practices and rituals.

Old habits are hard to break; "No Irish Need Apply" was not uncommon even in the second half of the 20th century, and Irish stereotypes and persecutions today are no new thing.

*The names of papal bulls don't always signify their topic; in this case, it is named for the opening word, which says (in English) "Laudably and profitably doth your Majesty consider how..." N.B.: scholars have argued for the last few centuries over the authenticity and authority of Laudabiliter, but for the present purpose, we can accept that it was very real for the 12th century.

Why "Middle" Ages?

So if the phrase "Dark Ages" was coined by Petrarch to describe the loss/lapse of much classical learning and advancement since the Decline of Rome (5th century CE), why do we say "Middle Ages," and what were they in the "middle" of?

Petrarch's term didn't become a widespread label; the centuries immediately following him didn't study history dogmatically the way a modern liberal studies education demands. It was a German classical scholar named Christoph Cellarius (1638-1707) who standardized the three general periods of the past two millenia with his mammoth work Universal History Divided into an Ancient, Medieval, and New Period. "Medieval" was from the Latin medium aevum (literally, "middle age"). This triple division struck the right note and entered the realm of conventional wisdom.

Still, the "Dark Ages" didn't go out of fashion, although its definition and popularity shifted. The American Cyclopaedia in 1883 said:

The Dark Ages is a term applied in its widest sense to that period of intellectual depression in the history of Europe from the establishment of the barbarian supremacy in the fifth century to the revival of learning about the beginning of the fifteenth, thus nearly corresponding in extent with the Middle Ages.

The Encyclopaedia Britannica, 11th edition (1911) defined the Dark Ages as the period from the fifth to the tenth centuries, affirming that "the Dark Age was a reality."

In 1929, however, the 14th edition of Britannica removed the term "Dark Ages" and stated:

the contrast, once so fashionable, between the ages of darkness and the ages of light has no more truth in it than have the idealistic fancies which underlie attempts at mediaeval revivalism.

A scholarly view of the "Dark Ages" has largely been eliminated in favor of the generic term "medieval" to distinguish between the Classical and Modern eras (Cellarius would be proud). In fact, because artistic, cultural, political and technological (et alia) development is a continuum, the division of "eras" has been muddled with a recent trend to refer to the Renaissance as the "Early Modern Era" (I remember a lecture from my grad school days in which we joked that maybe the Middle Ages would soon be labeled the "Really Early Modern Era."

Part of this desire to eliminate the concept of "dark" Ages is also 20th century understanding that not only was the period not a complete intellectual wasteland, but also that there were at least three "re-births" of education and art prior to what we think of as the European Renaissance.

But that's a topic for another day.

Why "Dark" Ages?

Once in a time known as the Dark Ages
There lived a legend whose coming had been foretold
by the great prophet Merlin.

This is the opening of a 1999 film on Joan of Arc. Joan's dates were 1412-1431, a far cry from anyone's idea of the Dark Ages.* What were the Dark Ages, exactly? The term is commonly used to refer to a time when education lapsed and "not much happened." Well, the amount that was happening could fill a daily blog for quite awhile.

The concept of a Dark Age is credited to Francesco Petrarch (1304-1374), who traveled Europe looking for Latin classics. The story goes that, upon discovering a "lost" collection of the letters of Cicero (106-43 BCE) in the 1330s, he expressed his disgust that such splendor had existed long ago but not preserved or improved upon in the intervening years:

Each famous author of antiquity whom I recover places a new offense and another cause of dishonor to the charge of earlier generations, who, not satisfied with their own disgraceful barrenness, permitted the fruit of other minds, and the writings that their ancestors had produced by toil and application, to perish through insufferable neglect. Although they had nothing of their own to hand down to those who were to come after, they robbed posterity of its ancestral heritage.

Essentially, for Petrarch, the Dark Ages was that period between the glory that was Rome and the glory that was his own era. Nowadays, if the term "Dark Ages" is used at all, it is used for the first half of the Middle Ages, denoting the period right after the fall of Rome to about 1100.

So where/when did we start talking about the "Middle" Ages?

[to be continued]

*And don't get me started on "Merlin" having a prophecy about Joan.