Valencia Later

After all the political turmoil, Valencia was possessed by James I of Aragon. He forced tens of thousands of Muslims to leave. There were Jews in Valencia, and in 1239 they were given their own quarter in which to live, with a cemetery for Jews on the outskirts. In 1390, this quarter had a high wall erected around its perimeter, with the cemetery still outside. The wall had three gates which were closed each night.

The wall, designed to help Christians feel "safe" from Jewish presence, did not prevent a pogrom in 1391. A parade of Christian youths marched to the Jewish quarter, claiming that Jews should be baptized or die. Thousands of Jews were murdered by the crowd; some converted; the Jewish quarter was destroyed.

Of course, no matter how wealthy or poor, free or conquered, Christian or Muslim or Jewish a European or Mediterranean country could be, sooner or later in the Middle Ages the Bubonic Plague came along. Plague came to the Iberian Peninsula in the spring of 1348, reducing the population of Spain (it is estimated) from 6,000,000 to under 2,500,000.

The Plague returned in waves. It was back again in March 1395; on 6 July the city council of Valencia met to determine how to combat the problem. Charitable donations were suggested to please God (whose anger was the ultimate source of their distress), and a procession to the chapel of Our Lady of Mercy was organized to ask for divine mercy. Funds were authorized for the removal of dead animals that had been thrown into the streets.

Something entirely different was also happening in Valencia that decade. Genoese traders realized that the Valencian climate was good for the growing of white mulberry, a fast-growing tree native to China and India. The important thing about white mulberry is that its leaves are the preferred food of a moth whose scientific name is Bombyx mori, and whose importance is their larvae, which we know as silkworms.

Silk as highly prized, and production had been controlled and kept secret for centuries by China. Once Mediterranean cultures discovered the secret, they worked hard to free themselves from dependence on the Far East. For a time, thanks to the Genoese merchants in Valencia, the area was a major center of silk production. Valencia became an economic powerhouse and entered into a Golden Age of expansion and building.

Unfortunately, a civil war in the 1520s created many internal problems. The city's prominence continued to slide until in the early 18th century the War of Spanish Succession marked the end of its independence.

Now, about the Genoese merchants who started silk production in Valencia. They traded in more than silk. I'll tell you more about them tomorrow, and the medieval slave trade.

Got Silk?

Silk was not a medieval invention. According to Chinese tradition, Empress Si-Ling-Chi in 2460 BCE watched silkworms spinning cocoons; she unwound several cocoons, then ran the strands together to make thread, then wove the result into cloth to make a robe for Emperor Huang-Ti.

The Silk Road routes

Unverifiable, but it may very well be true. What is slightly more historically documented is that China guarded the secret of this magnificent fabric for centuries, but was willing to manufacture the cloth and sell it for very high prices to others. Wealthy people from other countries would gladly pay large sums to purchase it—soft and smooth, light to wear, dyed easily—so knowledge of this material spread. India somehow figured out the secret and was manufacturing its own silk by the 2nd century CE.

Ezekiel mentions silk, which means it was known to the Middle East in the 6th century BCE. Aristotle mentions the process of dealing with the cocoons, but the knowledge must have been lost for awhile, because it seems to be a mystery to that part of the world centuries later. We are told that Julius Caesar (100-15 March 44 BCE) had silk curtains. It is thought that the Romans first encountered silk in the hands of the Parthians in the first century BCE. By the end of the 1st century CE, Rome was trading for silk with the Parthians; we don't know what kind of "mark up" the Parthians were putting on the silk that they got from the East, but it was probably substantial. Although more than silk was traded between the East and West, silk was one of the few things only available from the Far East, and so the collection of interconnected trade routes from China and India to Byzantium and Alexandria became known as the "Silk Road."

Of course, it is cheaper to manage production yourself, and the Byzantine scholar Procopius (500-565 CE) tells us how some Nestorian monks* gave the Emperor Justinian the secret: the thread comes from silkworms that could not survive transportation, but their cocoons would travel well if insulated in dung and fed on mulberry leaves when hatched. Byzantium created a thriving silk industry and supplied Europe for centuries. The silk factories were staffed by all-female crews, and so were called gynaecea—after the name given to the section of a Roman or Greek home devoted to women.

Marco Polo on the Silk Road

The cycle of industrial espionage continued, however, when Muslims, who learned the secret of silk when they conquered Persia, took over Sicily and Spain. By the 13th century, Europe was producing its own silk and purchasing less from Byzantium. By the 15th century, France had its own factories. This was necessary, according to Louis XI, because purchasing silk from Italy created a trade deficit for France of 40-50,000,000 gold écus.**

Silk is different from cotton or wool in that it is not spun; rather, two or more strands are twisted together. To produce this, new techniques were invented. The simple reel is said to have been first devised for holding strands of silk, which could be up to a mile long. Two reels would be set up to unwind simultaneously so that their strands could be twisted together in a technique called "throwing."

The Middle Ages loved silk so much that a whole new vocabulary was created to describe its uses in fabrics:

• alexander - a striped silk
• baldachin - a warp of gold thread with a woof of silk
• begin - 14th century rayed silk fabric
• camlet - half silk/half hair (such as angora)
• cendal - woven silk material
• ecarlate - high-quality silk
• gauze - semi-transparent silk (from 13th century onward)
• imperial - silk with gold thread; originally from Byzantium, later called baldachin
• osterni - silk dyed purple
• samite - silk with interwoven gold or silver threads
• sarcenet - thin soft silk with slight sheen; sometimes called "shot"
• tartaire - silk from Tartary

...and in all these centuries, it hasn't lost its luster.

*Remember the Nestorians? They were a branch of Christianity deemed heretical a century before Procopius, who made their home in the East where William Rubruck ran into them.
**Story of the Silk Road by Yiping Zhang, p.146 (I don't normally bog things down with citations—I assume you trust me!—but this number was so ... impressive that I felt the need to point to a source. It may be a huge exaggeration.