So, the reverence given to the color blue goes as far back as the Byzantine Empire, also known as the Eastern Roman Empire which existed between 330 AD and 1453.
The Silk Road continued in popular use until the Byzantine Empire fell to the Ottoman Turks in 1453 CE, who promptly closed off the Silk Road and cut all ties to the west.
Sharing continuity with the classical Roman Empire gave the Byzantine empire a technological and artistic advantage over its neighbors, whom Byzantines considered barbarians.
The 1st princes of Kiev, the descendants of Rurik find with themselves alternately trading and fighting with the wealthy and ancient Byzantine Empire to the South.
In the 12 century economic threats rose in the West as rising Italian Naval powers like Venice and Genoa started cutting Byzantine Empire out of Eastern markets.
Farther east, the people of the so-called Byzantine Empire would deny that they had ever stopped being Romans, even though the Byzantines would tell you this not in Latin, but in ancient Greek.