I am an Asian American fantasy author, so I feel I should be more versed on this but alas, my knowledge on the subject is limited to what I learned in school. The Silk Road comes to mind, but my knowledge on the subject is limited to what we glazed over in school. I am wondering about Brittany/ France between the 14th and 15th centuries in particular; any insight would prove extremely useful. Just trying to ensure my due diligence. Thank you.
There was Rabban bar Sauma (died 1294) a Uighur Turkic Nestorisn bishop who travelled to Europe as an ambassador for the Mongols and met the Kings of France and England and the Pope.
He was treated incredibly well as a Christian and ambassador of the most powerful ruler in the world.
My impression is that he was unique, I haven't heard of any other East Asians who reached Western Europe apart from Mongol raiders, who reached into modern Austria and Germany at times.
https://pages.uoregon.edu/sshoemak/324/texts/monks_of_kubla_khan.htm