Final answer:
The Aztecs built the Templo Mayor in the center of Tenochtitlán for religious and ceremonial purposes.
Step-by-step explanation:
The Aztecs built the Templo Mayor in the center of Tenochtitlán for religious and ceremonial purposes. The Templo Mayor consisted of two temples on top of a pyramidal base and was dedicated to the Gods Tlaloc and Huitzilopochtli.
It served as the heart of the capital city, where important rituals and ceremonies took place, including the naming of leaders.
The Templo Mayor was expanded multiple times, with each addition incorporating temples built over previous ones, eventually reaching a height of 39.6 meters.