Marco Polo

Marco Polo was a merchant for the Venetian Republic of Italy. He learned trading from his father, Niccolò Polo, and his uncle, Maffeo Polo.

Marco was an ally of the Assassin Order, which included Dante Alighieri and Domenico Auditore's father. Marco hired Domenico as a sailor on his journeys, probably to keep him safe from Templars. Later, he and Domenico's father put him under the guidance of Dante, who trained him to be an Assassin.
Marco later travelled to Asia, where he met Kublai Khan and visited the palace of Genghis Khan, acquiring the Assassins Codex, which he later brought back to Italy.
After he and Domenico's father found out of Dante's death, which they knew was a Templar assassination, they gave Domenico the Codex and told him to leave Italy.

In 1323, Marco confined to bed due to illness. Eventually, he died somewhere between January 8 and 9, 1324.
Domenico later got back to find his father and Marco dead.