Moctezuma Xocoyotzin, retroactively referred to in European sources as Moctezuma II, and often called Montezuma, was the ninth emperor of the Aztec Empire, reigning from 1502 or 1503 to 1520. Through his marriage with Queen Tlapalizquixochtzin of Ecatepec, one of his two wives, he was also the king consort of the altepetl.