Who was rabban sauma?

Rabban Sauma was a 13th-century Christian monk and diplomat of Mongolian origin, known for his journey to Europe as an envoy for the Ilkhanate, a division of the Mongol Empire. He was born in what is now modern-day Mongolia and became a prominent figure in the Nestorian Church. His travels took him to various European courts, including those of the Pope and the French king, where he sought alliances against the Muslims. Sauma's life and missions reflect the complex interplay of cultures and religions during the Mongol expansion.