The Siege of Ragusa

A 9th-century Arab dynasty almost ended the city of Dubrovnik in its infancy. At the time, it was called Ragusa, founded about 615CE by refugees fleeing the destruction of the Roman city Epidaurum during the war between the Avars and Slavs. Ragusa/Dubrovnik was an ideal spot, having a sandy shore onto which boats could be dragged when not plying the waves, and a source of fresh water for the inhabitants.

They built their town with the natural timber found all over, namely the Holm Oak, whose name in Croatian, dubrava, gave the town its later name. Mindful of their war-torn origin, they fortified the town against possible invaders.

Invaders came in the form of the Aghlabids of Ifriqiya, functioning as pirates and looking for new territory to conquer. Byzantine records state that the Aghlabids launched a campaign against the south-eastern coasts of the Adriatic in 866. They succeeded in plundering cities along the coast until they reached Ragusa. Finding the city fortified, they set up a siege, intending to wait out the inhabitants.

Ragusa turned out to be better prepared than expected; they withstood the siege for fifteen months! They could not last indefinitely, however, and snuck messengers out of the city to request aid from the Byzantine Empire. Byzantium had once controlled and patrolled the region but had allowed that vigilance to subside; it was their absence that enabled the Aghlabids to invade.

The latest emperor, however, wished to re-assert control over areas to the west. Emperor Basil I sent a fleet of 100 ships under the command of admiral Niketas Oryphas. News of the Byzantine fleet's approach caused the Aghlabids to withdraw. Admiral Oryphas planned future expeditions to push Saracens out of the region, slowly returning the Adriatic and southern Italy to Christian rule.

Every 3 February modern Dubrovnik celebrates with parades and several days of festivities in honor of their patron saint, Sveti Vlaho, or, as he is better known in the West, Saint Blaise. Let me tell you his story next time.

The Laffer Curve

That is an odd headline (and topic) for a blog on the Middle Ages, but let's push on and see where we wind up. The Laffer Curve (named for Arthur Laffer, illustrates a "a supposed relationship between economic activity and the rate of taxation which suggests that there is an optimum tax rate which maximizes tax revenue." [New Oxford American Dictionary] Arthur Laffer acknowledged that Ibn Khaldun essentially defined what we now call the Laffer Curve in his best-known book, Al-Muqaddimah ("Introduction").

We know quite a bit about Ibn Khaldun (27 May 1332 - 17 March 1406) because he wrote an autobiography. Born to a wealthy Arabic family, he was able to trace his ancestry back to the time of Mohammed. He had a classical Islamic education, memorized the Koran, and studied law and Arab linguistics. He also learned mathematics, logic, and philosophy. While in his teenage years, both parents died in the first big wave of the Black Death.

He started his political career at the age of 20 in Tunisia, producing fine calligraphy on official documents, but shortly after moved to Fez as a writer of royal proclamations. There he fell out with the sultan while scheming to advance himself and went to jail for 22 months. After getting out, he was not getting the attention he felt he deserved in terms of jobs, and decided to move to Granada. The Sultan of Granada gave him a diplomatic mission to King Pedro the Cruel of Castile, which Ibn Khaldun carried out successfully. Eventually getting involved in too much political intrigue, he left for Ifriqiya, where the current sultan had been Khaldun's cellmate! The sultan made Khaldun his prime minister. In 1366, that sultan died, and Khaldun allied himself with a different sultan, who was defeated a few years later, upon which Khaldun decided a monastic life was best. He continued to get involved in politics, however, always finding ways to anger someone.

Regarding his works, Al-Muqaddimah was the first part of a seven-volume work that included a world history up to his time. The socio-economic-geographical approach to describing empires is considered by 19th and 20th century scholars as the first ever writing in the social sciences. Khaldun explains that there is a group solidarity that enables small groups to grow in power, and yet become their own worst enemy and eventually fall from power and be overcome by another tightly knit group. He had similarly ahead-of-his-time ideas about economics.

I will leave the discussion of Ibn Khaldun (for now at least) with one more thing: his apt description of government as "an institution which prevents injustice other than such as it commits itself."

A large part of his historical work involves the Berbers, and I will talk about them in the next post.

Ifriqiya

Along the Mediterranean coast of Northern Africa was an area controlled by the Roman Empire called the Africa Proconsularis. When the Empire broke up, the Byzantine Eastern Empire still controlled the territory until the Muslim Empire started its westward move, ultimately reaching the Iberian Peninsula.

To be clear, Islam existed in the area already, but Muslims did not have political control until the Umayyads took over in 703CE. Ifriqiya included modern Tunisia, eastern Algeria, and western Libya (shown here in red).

Control shifted from dynasty to dynasty: from Umayyads to the Aghlabids (who were regents for the Abbasids) to the Fatimids in 909, to their own regents, the Zirids, who slowly grew in power, then to the Almohads and finally the Hafsids. The capital city was Kairouan, or al-Qayrawān, founded in 670 by the Umayyads. It became an intellectual and cultural center for Sunni Islamic scholarship. Charlemagne sent envoys to Kairouan; they returned with reports of the amazing palaces and gardens, not to mention reports of the heavy taxation of the population that paid for the excesses of the ruling class.

Several mosques in Africa are the result of Muslim influence spreading out and southward from Ifriqiya. Swahili absorbs vocabulary from many languages, most recently English, but 16-20% of its vocabulary still is from Arabic, especially administrative terms.

Notable individuals from Ifriqiya include Constantine the African (mentioned in a recent post), and the historian Ibn Khaldun, who would be worth taking a closer look at in the next post.

The Book of Pee

One of the medical texts composed by Isaac Israeli ben Solomon was translated from Arabic to Latin and called De Urinis ("Concerning Urine"). One manuscript copy (Ms. 690) in the University of Utrecht Library shows signs of frequent use, and yet has survived for 800 years with its original binding, showing extreme care being taken by any of its owners.

De Urinis was not one of the books translated at Toledo; the Latin version that was used in the Middle Ages was translated by Constantine the African, a Benedictine monk and physician who spent the first part of his life in Ifriqiya, then brought Isaac's work and others from Tunisia to his retirement at the Benedictine Abbey of Monte Casino. Unfortunately, Constantine often did not include in his translation the name of the original author, leading many to think that he himself wrote the medical texts. It took other references to these works to be able to affix the proper author's name. (The illustration here shows a dog's head added to the margin by a bored copyist.)

There are ten sections to De Urinis, as follows:

1. The science of uroscopy, placing it in context of the four temperaments*, particularly in relation to the blood;
2. The importance of nocturnal urine;
3. Types of urine in relation to pathology;
4. Urine as humor-discharging fluid;
5. Types of urine by colour;
6. The state of the body judging by its colour;
7. Types of urine based on clarity and viscosity;
8. Sediment in relation to pathology;
9. Types of urine in coherence with sediment;
10. Different types of urine and sediments and their meaning.

According to the Utrecht summary of the manuscript:

This text influenced islamic medicine to a great extent (where uroscopy was of great importance) and contributed to the rise of uroscopy as one of the most important branches of medicine in the Middle Ages (Prioreschi 2001). Ms. 690 is a remarkably early witness of this.

If you would like to see the manuscript in digital form, click here.

This is the second post in a row that mentions Ifriqiya, which sounds like "Africa" and should be addressed. I shall do so next.

*Referring to the four humors whose proportions determined a human being's temperament and health: yellow bile, black bile, phlegm, and blood.

Isaac Israeli ben Solomon

Some of the works translated at Toledo by our old friend Gerard of Cremona were the Book of Definitions and the Book of Elements into Latin from Arabic. Written by Isaac Israeli ben Solomon (alias Isaac Israeli the Elder, alias Isaac Judaeus), sometimes known as Isaac the Jew, they and his other works became standard works in medicine at Salerno.

Isaac Israeli ben Solomon was born in Egypt around 832CE. Growing up in Cairo, he became known as a skilled oculist (illustration is from an Arabic manuscript on oculism, showing the parts of the eye). About 904CE he was made court physician to Emir Ziyadat Allah III of Ifriqya (and I really should talk about him and there in the near future). A few years later he traveled to Kairouan, Tunisia and studied under a famous Arab physician, then became the doctor to 'Ubaid Allah al-Mahdi, who founded the Fatimid dynasty. al-Mahdi found Israel charming and witty.

In Kairouan he started writing his treatises, which were considered "more valuable than gems," and giving popular lectures on medicine and other topics in science. All his treatises were written in Arabic. Besides the ones mentioned above, they also include The Book on Fevers, a work on food and remedies called Universal Diet, and more. He also wrote books on philosophy, metaphysics, logic, a commentary on Genesis, and a treatise on the difference between the spirit and the soul. The Latin translations of many of these were quoted by Albertus Magnus, Aquinas, Roger Bacon, Nicholas of Cusa, and others.

Next I want to delve into one of his works specifically. I don't think I've ever indulged in what they call "dad jokes," but let me just say "urine for a treat."