Aztec temples are absolutely stunning. Commonly confused with pyramids, these are beautiful pieces of architecture in their own right. Also, the place of many bloody events!
Aztec temples were called, by the Mexica people of the empire,Teocalli - God houses. The priests of the Aztec religion went to these temples to worship and pray, and make offerings to the gods to keep them strong and in balance.
Cities would be devoted to religious activities with particular monuments built for specific gods.
E.G Temple Mayor,
It was the main religious building in the capital city, and it had two shrines on the top - one to Huitzilopochtli and one to Tlaloc. Huitzilopochtli (Hummingbird of the South) was the patron god of the Mexica people, the one who led them to Tenochtitlan in the first place. He was the god of the sun and war. Tlaloc was the god of rain and fertility. Both gods required constant human sacrifice. During the final phase of construction, thousands were sacrificed.