As per Aztec sources, an ethnic group in Central Mexico, during the 14th to16th century, a temple was built, dedicating to two gods, the god of war, and the god of rain and agriculture. Templo Mayor was one of the main temples.
The temple remained lost until an Aztec carving was found in the City of Mexico in 1978. It was discovered by workers who were digging for the metro. The carving was of the Aztec Moon Goddess. The Mexican President authorized the Templo Mayor project after this discovery.
The current site of Templo Mayor is the result of 32 years of excavations. A museum adjoining these ruins was built to display the fragile pieces excavated from the site. The Templo Mayor is still an ongoing archaeological excavation site.