Raw silk was obtained only from Asia until 550 AD, when two monks sent from the Roman Empire secretly stole silkworm eggs from China and brought them to Europe.

• 在公元550年之前，生丝一直都只能在亚洲获得，直到两个东罗马帝国的修道士从中国偷走了蚕种并把它带到了欧洲。