In the heart of Mexico City, the accidental discovery of a massive, intricately carved stone disk by electrical workers in 1978 triggered a monumental archaeological excavation. This find, depicting the Aztec goddess Coyolxauhqui, unveiled the buried remains of the Templo Mayor, the sacred center of the ancient Aztec capital, Tenochtitlan. The subsequent demolition of thirteen city blocks revealed a lost civilization, offering a profound glimpse into the sophisticated culture, religion, and engineering prowess of a people whose empire once dominated the region before being erased by time.