The Aztec religion is a polytheistic and monistic pantheism in which the Nahua concept of teotl was construed as the supreme god Ometeotl, as well as a diverse pantheon of lesser gods and manifestations of nature. The popular religion tended to embrace the mythological and polytheistic aspects, and the Aztec Empire's state religion sponsored both the monism of the upper classes and the popular heterodoxies.
The most important deities were worshiped by priests in Tenochtitlan, particularly Tlaloc and the god of the Mexica, Huitzilopochtli, whose shrines were located on Templo Mayor. Their priests would receive special dispensation from the empire. When other states were conquered the empire would often incorporate practices from its new territories into the mainstream religion.