Marco Polo (1254-1324), a Venetian merchant, spent many years in the service of Kubilai Khan and in his journeys to and from the Khan's court and around the Mongol Empire picked up immense amounts of direct and indirect knowledge about Asia. After his return to Europe he became involved in fighting between Venice and Genoa, was made a prisoner-of-war and in prison met Rustichello da Pisa, who wrote down the story of Polo's adventures.