Polo, a 13th-century merchant from the Republic of Venice, describes his travels to Yuan-dynasty China and the court of Mongol ruler Kublai Khan, along with the preceding journeys made by Niccolò and Maffeo Polo, his father and uncle, respectively, in his "Travels of Marco Polo". Polo related this account to Rustichello da Pisa around 1298 while they shared a Genoese prison cell following their capture in battle. In his return trip to Persia from China (setting out from the port at Quanzhou in 1291), Marco Polo said that he accompanied the Mongol princess Kököchin in her intended marriage to Arghun, ruler of the Mongol Ilkhanate, but she instead married his son Ghazan following the former's sudden death. Although Marco Polo's presence is omitted entirely, his story is confirmed by the 14th-century Persian historian Rashid-al-Din Hamadani in his "Jami' al-tawarikh".