Arghun Khan aka Argon ( Mongolian Cyrillic: Аргун хан; c. 1258 – March 7, 1291) was the fourth ruler of the Mongol empire's Ilkhanate, from 1284 to 1291. He was the son of Abaqa Khan, and like his father, was a devout Buddhist (although pro-Christian). He was known for sending several embassies to Europe in an unsuccessful attempt to form a Franco-Mongol alliance against the Muslims in the Holy Land. It was also Arghun who requested a new bride from his great-uncle Kublai Khan. The mission to escort the young Kökötchin across Asia to Arghun was reportedly taken by Marco Polo. Arghun died before Kökötchin arrived, so she instead married Arghun's son, Ghazan.