 Complete the following phrase:  Moctezuma Xocoyotzin   29 June 1520  , variant spellings include Motecuhzomatzin, Montezuma, Moteuczoma, Motecuhzoma, Motēuczōmah, Muteczuma, and referred to retroactively in European sources as Moctezuma II, was the ninth Tlatoani of Tenochtitlan and the sixth Huey Tlatoani or Emperor of the Aztec Empire, reigning from 1502 or 1503 to 1520. The first contact between the indigenous civilizations of Mesoamerica and Europeans took place during his reign, and he was killed during the initial stages of the 