Lonely Planet review for Templo Mayor
Before the Spaniards demolished it, the Teocalli of Tenochtitlán covered the site where the cathedral now stands and the blocks to its north and east. It wasn’t until 1978, after electricity workers happened on an eight-ton stone-disc carving of the Aztec goddess Coyolxauhqui, that the decision was taken to demolish colonial buildings and excavate the Templo Mayor. The temple is thought to be on the exact spot where the Aztecs saw their symbolic eagle, perching on a cactus with a snake in its beak – the symbol of Mexico today. In Aztec belief this was, literally, the center of the universe.