Rabban Bar Sauma was a Mongol-era monk and diplomat who traveled from China to Europe in the 13th century.
Born in or near Beijing to a family associated with the Church of the East, Bar Sauma became a monastic traveler with his companion Markos. Their journey westward took them through Central Asia and the Middle East. Markos later became Patriarch Yahballaha III, while Bar Sauma was sent as a diplomatic representative toward European courts.
Bar Sauma met or communicated with rulers and church leaders in places including Constantinople, Rome, Paris, and Bordeaux. His mission sought political and military cooperation between the Mongols and European powers, particularly against shared Muslim rivals, but it did not produce the alliance Mongol leaders hoped for.
He is sometimes confused with European travelers who visited the Mongol Empire from the west. Bar Sauma’s route was unusual because he traveled from East Asia toward Europe, offering a rare Asian Christian perspective on medieval international diplomacy.