Huitzilopochtli, from the Veytia Codex. In Aztec religion, Huitzilopochtli was a god of war, sun, human sacrifice and the patron of the city of Tenochtitlan. He was also the national god of the Mexicas of Tenochtitlan. Huitzilopochtli was a tribal god and a legendary wizard of the Aztecs. Originally he was of little importance to the Nahuas, but after the rise of the Aztecs, Tlacaelel reformed their religion and put Huitzilopochtli at the same level as Quetzalcoatl, Tlaloc, and Tezcatlipoca, making him a solar god. The Veytia Codex or Historia Antigua de Mexico was written by Don Mariano Fernandez de Echevarria Y Veytia (Mariano Veytia) 1720-1778, a celebrated Mexican historian.