The "Stone of the Sun," also known as the Aztec Calendar Stone, is a large monolithic sculpture created by the Aztecs in the 15th century. It is made of basalt and measures about 3.6 meters in diameter. The stone features intricate carvings that represent various aspects of Aztec cosmology, including the sun god Tonatiuh and the five worlds of creation. Originally located in the main temple of Tenochtitlán, the stone was buried after the Spanish conquest. It was rediscovered in 1790 and is now displayed at the National Museum of Anthropology in Mexico City, serving as a significant symbol of Mexican heritage and history.