Showing posts with label Paris. Show all posts
Showing posts with label Paris. Show all posts

Friday, April 7, 2023

John de Garlandia

There were two "Johns of Garland" whose careers get conflated in the 13th century. One was the philologist and grammarian, discussed here, and the other was a musicologist. Both were living in France at one time, but the second seems to have been born around the time of the first's death. They are sometimes distinguished by calling the latter Garlandia.

From Parisian records, this John seems to have been a keeper of a bookshop, and referred to as Jehan de Garlandia. His name is attached to two treatises, one of which, De Mensurabili Musica ("On measured music"), is considered the most important treatise on the early history of notation. Here is a summary of what makes it so significant:
Specifically, it describes a practice already in use, known as modal rhythm, which used the rhythmic modes. In this system, notes on the page are assigned to groups of long and short values based on their context. De mensurabili musica describes six rhythmic modes, corresponding to poetic feet: long-short (trochee), short-long (iamb), long-short-short (dactyl), short-short-long (anapest), long-long (spondee), and short-short (pyrrhic). Notation had not yet evolved to the point where the appearance of each note gave its duration; that had still to be understood from the position of a note in a phrase, which of the six rhythmic modes was being employed, and a number of other factors.

Modal rhythm is the defining rhythmic characteristic of the music of the Notre Dame school, giving it an utterly distinct sound, one which was to prevail throughout the thirteenth century.[New World Encyclopedia]

Did a bookshop opener write this work? Evidence suggests that it was written in 1240, before John was born (he lived until 1320, so writing in 1240 was not possible), but his name is attached to it, leading to the assumption that he edited the work, or at least wrote later chapters of it. Some of the records of the time refer to John as magister, however, suggesting that he was a teacher at the University of Paris and not just a seller of books. How much he had to do with this work is unknown, but the connection made to it historically is accepted in the absence of other evidence.

For more on the history of musical notation, see here and here.

For information on bookshops in the Middle Ages, well, you'll just have to come back tomorrow.

Friday, May 13, 2022

St. Geneviève

St. Geneviève was born a peasant in Nanterre around 419/22 CE. One day, while St. Germanus was passing through Nanterre, she told him she wanted to devote herself to God. He told her she should live a life espoused to Christ. At the age of 15, she decided to devote herself to the Christian life and move to Lutetia.

She spent 30 years mortifying her flesh through extensive fasting and abstaining from meat. Her austerity was considered excessive by her ecclesiastical superiors, who urged her to deprive herself less. She drew many visitors due to her piety, even divine visitors: she reported so many visions of angels that those jealous of her threatened to drown her in a lake. A visit by St. Germanus convinced her detractors to trust her.

Her piety was so strong that, when Attila was approaching Paris in 451, she convinced the people to pray instead of fleeing; the strength of her prayers turned the Huns instead to attack Orléans instead (I guess they did not have a saint to pray for them). In 464, Clovis and his father Childeric were besieging Paris (Gallo-Roman clergy were very resistant to the Frankish attempt to bring all of Gaul under its banner), Geneviève crossed their lines to bring grain to the city, and persuaded them to be merciful to the citizens.

Clotilde, the wife of King Clovis, was a patron and supporter of Geneviève, and may have commissioned her biography. Clotilde—a Catholic whom Clovis married partially to placate the clergy, whose cooperation he eventually realized he would need—was known for religious patronage; you can read about an example here.

Clovis (no doubt at Clotilde's urging) built an abbey where Geneviève could live. After her death, her tomb at the abbey saw many visitors and many miracles. In 1129, an epidemic of ergot poisoning was ravaging the city; it subsided after her relics were paraded through town.

Louis XV ordered a new church for the "patron saint of Paris." Before it was finished, her relics were destroyed in 1793 during the French Revolution, but some were recovered, and the church was finished and reconsecrated in 1885.

I was going to talk next about why she moved to "Lutetia" (see the first paragraph) and yet was called the "patron saint of Paris," but right now I really want to talk about ergot poisoning, so that's next.

Friday, February 11, 2022

Orleans University

The city of Orleans is in north-central France, in the Loire Valley. In the very early Middle Ages it had been the capital of the Kingdom of Orleans, but under the Capetians (who ruled France from 987CE to 1328), it became merely part of a county. It regained a little prominence when King Louis IV held his coronation in Orleans Cathedral instead of in Reims. In the later Middle Ages, Orleans was one of France's three richest cities, along with Paris and Rouen.

The University of Orleans started in 1230, when several; teachers and students fled the turmoil taking place at the University of Paris. Pope Clement V (1264-1314) studied there, and as pope published a papal bull in 1306, endowing the scholarly pursuits there with the status of university. In all, twelve popes granted it privileges.

In the 1300s it had as many as 5000 students from France, Germany, and even Scotland. Eustache Deschamps was one. St. Ivo of Kemartin, the patron saint of lawyers, was another. Later notables were John Calvin, Pierre de Fermat (of Fermat's Last Theorem fame), and Molière.

The current University of Orleans was founded in 1960. The original had been merged with the University of Paris in 1808.

Speaking of the University of Paris, what was the turmoil that caused teachers and students to flee to Orleans and start teaching there? We'll get into that next time.

Tuesday, December 11, 2018

Medieval Advertising

These days, we are assailed by advertising, and we possess technology that allows us to find what we need merely by asking the right question into a hand-held device. (I wonder that anyone in their teen years knows what it's like to use the yellow pages, or if they are even aware of what the phrase "yellow pages" means to the older generation.)

Centuries ago, signs or symbols indicated certain places of business. When most of your population cannot read, you needed to find the right image to represent your profession, such as the mortar and pestle for an apothecary, a boot for a cobbler, scissors for a tailor, etc.

It might not be a painted sign. Roman custom was to hang vine leaves to indicate a tavern where wine was served. This custom was brought to Britain, but in the absence of grapevines they used holly. A bush of holly was a common indication that wine was served within. If you made and sold beer, you would hang a long pole outside, indicating what you stirred ale with. Leaves on a pole let the traveler know that both beer and wine were available.

Of course, where there is food and drink, there should be quality control.
In 1389, King Richard II of England, decreed that landlords must put signs outside their inns, so that inspectors could identify and visit them; there is a record from 1393 of a publican being prosecuted for not having a sign. [source]
Of course, not all advertising was static. A 13th century poet, Guillaume de la Villeneuve, wrote the poem "Les Crieries de Paris" [Street cries of Paris]. Here's a sample of how he felt about merchants advertising their wares or services:
Although they will not stop screaming
Through Paris until the night.
Do not think it tires them
For they will never stop.
Listen to what is being shouted at daybreak:
"Lords, go to the baths
And in the ovens without delay,
The baths are hot, I'm not lying!"
Then you will hear the sound [of]
Those who shout fresh herrings.
"At the tide, the others shout,
In sage and white herring, fresh salted,
I would like to sell my herrings."
The introduction of mass printing and cheap paper meant signs and flyers could circulate more easily, eliminating the need for criers.

Wednesday, March 23, 2016

The Biggest Guild

A 1568 German woodcut showing a shoe shop
Which guilds were the biggest? Not the most powerful, but those with the most members? Let's look at a sampling. The tax lists for Paris in 1292 list the numbers of members of 130 guilds. Here are some of the largest:

21 - woodcarvers
21 - glove makers
22 - hay merchants
24 - harness makers
24 - rugmakers
24 - sculptors
24 - innkeepers
26 - rope makers
27 - locksmiths
29 - doctors
34 - blacksmiths
35 - spice merchants
37 - beer sellers
41 - fish merchants
42 - meat butchers
43 - laundresses
51 - chicken butchers
54 - hat makers
56 - wine sellers
58 - scabbard makers
62 - bakers
70 - coopers
70 - mercers
86 - weavers
95 - carpenters
104 - masons
106 - pastry cooks
121 - old clothes dealers
130 - restaurateurs
131 - jewelers
151 - barbers
197 - tailors
214 - furriers
...and the guild with the largest number of tradesmen in it:
366 - shoemakers
Why so many shoemakers? These days, we think of shoes as something with sturdy rubber soles, sealed to canvas or nylon or leather. What we have today is considered very durable; when they wear out, we dash to a store where the shelves are lined floor to ceiling with clearly marked lengths and widths of mass-produced footwear. Not so in the Middle Ages.

In the Middle Ages, and the centuries before, footwear was "bespoke"; that is, designed specifically for the foot it was supposed to enclose. A shoemaker would take your measurement, discuss materials and binding, and then set to work crafting shoes that would fit your feet, and not the feet of your neighbor or family member.

These shoes were not necessarily fitted with hard soles, either; in many cases, they are essentially slippers made of leather, and with every step they would scuff thinner and thinner. The leather used had to be soft and supple to fit snugly around your feet; it was mostly from goatskin or sheepskin, as opposed to the tougher cow leather used for saddlery, for instance. In fact, one term for a shoemaker, cordwainer, comes from Cordovan, because Cordoba in southern Spain was a source of goatskin commonly used for shoes.

Another note on terminology: These were not cobblers, but shoemakers. A cobbler did not make shoes: he repaired them.

Friday, March 28, 2014

Vikings - Art Imitates Life

A new TV show started in 2013 and has proven popular enough that it has been renewed for a couple more seasons. It is called "The Vikings." Its historicity would not be very satisfying to scholars, but it is very popular with audiences.

It centers on the character of Ragnar Lodbrok (in Old Norse that would look like Ragnarr Loðbrók). The saga of Ragnar is attached to the Norse Völsunga Saga ["Saga of the Volsungs," a clan that included Sigurd and therefore inspired the Nibelungenlied, the "Song of the Nibelungs"]. It tells us of Ragnar's quest for a wife, then for another wife, and of the deeds of their sons.

Ragnar actually had three marriages (in legend, that is: the exact truthfulness of the details of his existence cannot be proven). His first was to Lagertha, a Danish shield maiden. In the history written by Saxo Grammaticus, Lagertha got Ragnar's attention when she dressed as a man to fight against the Swedes who had killed King Siward of Norway. They married and had a son and two daughters.

Ragnar divorced her, however, so that he could marry Thora Borgarhjortr, the daughter of King Herraudr of Sweden. Despite that betrayal, Lagertha came to his aid when he dealt with a civil war in Denmark.*

Even later, Ragnar supposedly married Aslaug, who was the daughter of Sigurd (who killed Fafnir the Dragon in the Nibelungenlied) and Brunhild the Valkyrie. (It gets a little more mythical than usual here.)

Ragnar became a scourge of England and France. The invasion and pillaging of Paris on 28 March 845 is attributed to him.

King Aelle of Northumbria (who died on 21 March 867) was one of the English that Ragnar annoyed.  Aelle captured Ragnar and threw him in a pit of snakes. This would have happened prior to 865: the Anglo-Saxon Chronicle for 865 states that the Great Heathen Army that invaded England was led by Ragnar's sons to avenge their father.

*On the TV show, the marriage between Ragnar and Lagertha didn't survive the first season; the writers had him take up directly with the seductive Aslaug, skipping over the more likely marriage to Thora.

Thursday, October 31, 2013

The First Witch Trial

Well, not exactly. It is the first recorded witch trial. That is, the first whose details are written down, rather than a terse "hanged for being a witch."

The trial began on 29 October 1390, in the Place de Châtelet, a public square in Paris. Two women were accused of magic. Jeanne de Brigue
specialized in recovering lost or stolen items, and her talents had actually been used about six years before her arrest and trial by the priest of a neighboring village. She also cured the sick and made healthy people ill by means of magic. [Witch Beliefs and Witch Trials in the Middle Ages: Documents and Readings, by P. G. Maxwell-Stuart, p.178]
The other woman, Macette, readily confessed everything when she was questioned, including knowledge of how to bring harm to someone.
...capture two toads and put each of them separately into a new clay pot. Then she would have to take them, look at them, call here times upon Lucifer for help, recite three times the Gospel of St. John, Paternoster, and Ave Maria, put [the toads] back in the pot, and keep them under control with a bit of white bread and some breast milk. When she wanted to hurt her husband, ... she called Lucifer to her aid three times above each of the earthenware pots containing the toads before she uncovered them. After that, the recited the Gospel of St. John, and Paternoster, and Ave Maria. Once she had done this,  she opened the earthenware pots and stabbed the toads hard with long needles or small iron spikes, and the person she intended to hurt would suffer the same way the toads suffered, or something similar, and would not be able to rest anywhere, ... . [Ibid.]
Macette and de Brigue were both executed on 19 August 1391.

Happy Halloween.

Wednesday, October 9, 2013

The College of Sorbonne

A university meeting
Today is the birthday of the founder of the Sorbonne. The Collège of Sorbonne is arguably the best-known college in France, its name becoming synonymous with excellence, especially in the field of theology. It was founded in 1257 by Robert de Sorbon.

Robert de Sorbon (9 October 1201-15 August 1274) was born in a lower-class family in the Champagne-Ardennes region of northeast France, a wild part of the country prone to spawn legends and tales of adventure. Robert joined the church and studied at Reims and Paris. His devout bearing brought him to the attention of Louis IX, and he was named canon of Cambrai (next door to the Ardennes region) in 1251.

He became a teacher in 1253; in 1257 he created a college in Paris which he called Maison de Sorbonne [House of Sorbon] to teach theology to students who could not otherwise afford a university education. The Maison grew in popularity, however, and was endorsed by the King and by Pope Alexander IV (previously mentioned here and here). The College of Sorbonne grew to become the heart of the University of Paris (which produced such lights as Jean Buridan as well as conflicts). Sorbon became its chancellor until his death in 1274.

Sorbon created an academic environment that was (in the words of one scholar) "as opposed to mere hostel foundations and elementary forms of collegial living."
... Robert of Sorbon, formulated the central idea of the future college system in exemplary fashion: vivere socialiter et collegialiter, et moraliter, et scholariter*—a formulation which implies the existence of a study community organized in the form of a brotherhood and living together in regulated and moral fashion. [P. Glorieux, Les Origines du collège de Sorbon, quoted in A History of the University in Europe: Volume 1, Universities in the Middle Ages]
Among the students were Pope Clement VI and Nicholas Oresme.

*[roughly] "To live socially and collegially and morally and scholarly"

Thursday, November 15, 2012

Albertus Magnus & Astrology

Since the last two days have been about reconciling opposing views, and since today is the anniversary of the death of Albertus Magnus, it would probably be a good time to talk more about him.

Albertus Magnus (c.1200-1280) has only been mentioned so far in the context of rainbows, but he was involved in so much more than that. A German Dominican who became provincial of the order in 1254, he became so widely known for his learning that the term Magnus (The Great) was attached to his name in his lifetime by contemporaries such as Roger Bacon (also mentioned in the rainbow entries, as well as here). Although in the future the Dominicans would be nicknamed Domini canes (dogs of the Lord) and be put in charge of rooting out heresy, Albertus would actually spend part of his life writing to defend ideas that were considered heretical.

Most of the charges of heresy were coming from the University of Paris. The University issued a series of Condemnations between 1210 and 1277, condemning the teaching of ideas they considered heretical. Paris had no authority to universally condemn these teachings, however. In a twist that might seem very modern, this left other universities open to excellent marketing opportunities. The University of Toulouse invited students with "Those who wish to scrutinize the bosom of nature to the inmost can hear the books of Aristotle which were forbidden at Paris."

Attacking Aristotle was one way to raise the ire of Albertus. He had written commentaries on all available works of Aristotle, bringing that classical author more fully into the realm of accessible discussion. When Paris condemned the teaching of Aristotelian astrology as a threat to the notion of free will, Albertus had to get involved by writing the Speculum astronomiæ (Mirror on astronomy).* In this work, Albertus explains (using Aristotle's model of the heavens, of course), how the study of astrology and its predictive ability does not contravene God's Will or Free Will.

The order of the Heavenly Spheres
Between God's divine Will and human beings are the nine spheres of the heavens. As God's Will passes through each of the celestial and planetary spheres, it is tainted by exposure to those un-divine substances, just as water flowing down a stream can erode the banks and pick up silt. This has two results. One is that what we perceive in our study of astrology here from Earth is altered, meaning we are not looking directly at and anticipating God's intent for us. The other result is that, because the divine influence has been tainted or diluted by exposure to corporeal bodies, its influence is now corporeal; that is, it may affect our bodies, but not our souls. Astrological influence could make a man envious or prideful or lustful, and many people are content to just follow their impulses, but we have the ability to refuse to act on these impulses.

For Albertus, studying astrology helped to forewarn us about the influences that filtered down through the heavens, and gave us a chance to resist them. The Speculum became a central argument in favor of astrology for centuries, claiming that astrology helped us to understand and perfect our use of Free Will.

*There are numerous medieval works ascribed to Albertus Magnus with little proof, so modern scholars are cautious about claiming authorship; the Speculum has been disputed, but recent scholarship has found sufficient evidence to feel comfortable to claim it was by Albertus.

Friday, September 7, 2012

And then, Champagne

William of Champeaux (c.1070-1122) was a student of Anselm of Laon, and may have helped to compile the Glossa interlinearis. He may also have been born many years earlier than the date assumed, since he was appointed Master of Notre Dame in 1094, and 24 years old would have been a very young Master to handle some of the issues of the day. He taught at the cathedral school of Notre Dame, and like Anselm was a proponent of Realism.

A medieval university lecture
He also may have studied under the Nominalist Roscellinus of Compèigne. The Nominalists believed that universal/abstract concepts of Realism (which existed independent of our perceptions of things (think of Plato's myth of the cave) did not exist. Instead, there are only particular things: there is this chair and that chair, but no universal and abstract chair from which your and my chair derive. Words were either significant or made up. A significant word was intimately connected with the concept it described. Examples of words that are not significant are "chimaera" and "blictrix" and "hircocervus" because they are not real things. The extension of this approach leads to difficulties, because (as we know) we can talk about things that are untrue.

William, however, rejected Nominalism. He and Anselm of Laon were Realists. William is considered by some to be the founder of an extreme form of Realism, perhaps as a result of refining his views during debates with Peter Abelard.

One of the most famous students in Paris was Peter Abelard, more of whose writings have survived and been widely read than William's. Abelard debated with William numerous times over these concepts and others. Although Abelard (according to his own biographical work) lost every time, he calls William a jealous and defeated and discredited man, and claims that William was driven from the Paris schools. Even so, Abelard followed William in order to study under him further, which may be more telling than Abelard's criticisms of a man to whom he lost several arguments.

It is true that William left Paris. He went to the Abbey of St. Victor just outside of Paris. Two of his students from this time were Hugh of St. Victor and Bernard of Clairvaux, both of whom would greatly distinguish themselves. William continued to gain the attention of his superiors, as well, who moved him wherever they felt the need for a calm head and a devout reformer.

...and then, Champagne.

Champagne is a sparkling wine produced via a secondary fermentation in the bottle that produces carbonation. It is properly only made from grapes grown in the Champagne Valley region in northeast France, the boundaries of which are determined by law. This Champagne wine was first made notable when it was used at special occasions such as French coronation festivities. It was William in 1114, in his capacity as bishop of Chalons-sur-Champagne, who issued the Grande charte champenoise (Great Champagne Chart). This "defined the agricultural and viticultural possessions of the Abbey of Saint-Pierre-aux-Monts, thus giving rise to the modern Champagne wine region." [reference] Although the boundaries since then have been amended a few times, it was William of Champeaux, extreme Realist and theologian, who first determined what could rightly be called "champagne."

*I apologize for not being better at explaining philosophical concepts; also, I do not even want to try to get into more detail, lest I get us both bogged down.

Thursday, September 6, 2012

Anselm of Laon Explains the Bible

Anselm of Laon (d.15 July 1117) studied under one of the great names of the day, St. Anselm of Bec, whom I teased about here. He became a master of the new scholastic theology, and helped establish two schools of theology and created a new way to read the Bible.

Scholastic theology was a blend of two traditions: patristic learning (that is, writings from the fathers of the early church, such as Augustine), and the reasoning skills derived from reading the non-Christian thinkers such as Greek philosophers and Jewish scholars (which at this point were usually available because of Islamic scholars). The Scholastics were no longer content to shake their heads and simply accept apparent inconsistencies in the Bible. Their goal was to order and understand the entire world, and that meant first understanding the Bible.

17th century edition of Anselm's Bible
Consequently, Anselm produced an edition of the Bible called the Glossa interlinearis, so-called because his commentary was written above or next to each line.* Anselm's work was groundbreaking in that it presented a discussion and explanation for the Bible in an easily accessible manner, verse by verse.

His other notable contribution to theology was at the university in Paris, which he co-founded with William of Champeaux. Here theologians promoted Realism, the philosophy that our reality is independent of our beliefs, perceptions, and language. For Realists, truth is understood as one learns of and conforms to reality.

Anselm of Laon became so well-known for his understanding of theology that, when he moved to Laon to start a school there, scholars traveled to study with him. One of these, Peter Abelard, would be expelled from the school by Anselm in 1113 after debates over the validity of Realism, but would go on to become, in his turn, one of the groundbreaking theologians of the next generation. Anselm, though not well known now, would have been happy to know that his glosses on the Bible were re-printed several times over the following centuries.

*Modern scholars think it more likely that the Glossa was compiled by Anselm's students after his death, using Anselm's lectures and (now lost) writings.  This was one of two chief commentaries on the Bible. The other was the Glossa ordinaria of Walafrid Strabo (808-849).

Friday, July 13, 2012

The Birth of Tick-Tock

A city without bells is like a blind man without a stick. —Rabelais
Rabelais (c.1494-1553) was a little late for this blog, but his statement in Chapter XIX of Gargantua indicates a reliance on time-keeping that the modern world can understand. It was not always thus, however, for the Middle Ages.

I discussed yesterday how early concepts of time by their nature might have made it difficult to think of time as something measurable. I mentioned a mid-1200s definition of time that came from Franco of Cologne, the mathematically-minded music theorist who created what is the basis for modern musical notation. Franco's most diligent biographer places him as chapelmaster at Notre Dame in Paris.

Johannes de Sacrobosco (c.1195-c.1256) taught at the University of Paris, probably contemporaneously with Franco. Johannes was an astronomer who, among other things, declared that there was a flaw in the Julian calendar: it was 10 days off. (That error wouldn't be corrected until long after.) He also wrote of an attempt he knew to construct a wheel that would make a complete rotation in one day. Robertus Anglicus wrote a commentary in 1270 on Sacrobosco's treatise, mentioning the device and further spreading the idea. In that same decade, a clock is described by someone writing in Spain that runs by the flow of mercury from chamber to chamber in a wheel.

It only took a generation for this idea to catch on. By 1300, clocks were becoming widely known (if not widely owned), but the early ones only measured hours—they rang bells, but had no faces with markings around a dial, no minutes or seconds were counted, that we know of.

The device described by Sacrobosco and Anglicus used a weight hanging from a line around a wheel or cylinder. The Middle Ages understood wheels, gears, levers and pulleys, but how could these be used to guarantee a steady revolution of the weighted wheel? Sometime around 1300, or not long after, some early mechanical "Eureka" moment took place. Someone designed what we call the "escapement," which rocked back and forth on a toothed gear, allowing the wheel to turn at a steady, measurable, predictable speed. It also had a side-effect: a steady sound that we have been listening to ever since.

The escapement.

Within a generation after 1300, Dante Alighieri (c.1265-1321) considers his audience familiar enough with clocks and their mechanism to use gears as a metaphor:
As the wheels within a clockwork synchronize
       So that the innermost, when looked at closely
       Seems to be standing, while the outermost flies. (Canto xxiv, Paradiso)
Humans could now mark time in sequences of ticks and tocks. Minutes and seconds could be distinguished. Hours could be regulated. Six hours before noon became the same, whether it were dark in winter or already light in summer. (That's right: the 12 hours from sunrise until sunset used to be extended or shortened depending upon the season.) This was a change from the canonical hours described by the Rule of St. Benedict, for whom prayers at Matins were supposed to end as the sun rose, and therefore had to be started at different times depending on the season. In 1370, Charles V of France installed a clock in his palace, and decreed that all clocks in Paris be set according to his. Punctuality, crucial feature of our modern world, was born.

Tuesday, May 22, 2012

Nicholas Oresme

Does the Earth rotate?

Born in  the 1320s, Nicholas (or Nicolas) Oresme likely came from humble beginnings; we assume this because he attended the College of Navarre, a royally funded and sponsored college for those who could not afford the University of Paris. He had his master of arts by 1342, and received his doctorate in 1356. ne of his published works was:

Livre du ciel et du monde
(The Book of Heaven and Earth)
In this work he discussed the arguments for and against the rotation of the Earth.
  • He dismissed the notion that a rotating Earth would leave all the air behind, or cause a constant wind from east to west, pointing out that everything with the Earth would also rotate, including the air and water.
  • He rejects as figures of speech any biblical passages that seem to support a fixed Earth or a moving sun. (Keep in mind even today we unanimously speak about the beauty of the sun setting when it's really the Earth rising!)
  • He points out that it makes more sense for the Earth to move than for the (presumably more expansive and massive) heavenly spheres and Sun to move.
  • He assures his readers that all the movements we see in the heavens could be accounted for by a rotating Earth.
  • Then he assures the reader that everyone including himself thinks the heavens move around the earth, and after all he has no real evidence to the contrary!