Mongolian language documents in the vatican archive

Stumbles across an interesting site of the Vatican Archives, where several Mongol Bichig documents are still kept. The story that I know, that isn't mentioned here is that of Raban Sauma, who travels from the Mongolian Court in Beijing all the way to the Vatican and delivers a letter.

On the Vatican site they have some information on the Ilkhans of Persia:

"The three documents written by the chancery of the Mongolian Ilkhans of Persia are respectively: a safe-conduct of 1267 (or at latest of 1279) issued by Abaya to a papal embassy on his way back to the West; a letter by Aryun to Pope Nicholas IV «the fifth day of the new moon of the first month of the Summer of the year of the Tiger » (14th May 1290) and a letter by Gasan to Pope Boniface VIII of 1302 on the negotiations for the common attack plans against the Mamelukes of Egypt, who then were also the lords of Syria."