Silk

Supposedly invented in 2480 BCE in China, Silk was in high demand in Rome and expensive, so Justinian arranged to bring back silkworms and the silk making process from China. By 552 Constantinople was producing.
 Emperor Justinian Rome/China 552 Silk

Supposedly invented in 2480 BCE in China, Silk was in high demand in Rome and expensive, so Justinian arranged to bring back silkworms and the silk making process from China. By 552 Constantinople was producing.