Monolith of the Aztec sun stone also named Aztec calendar stone or just the Stone of the Sun, (National Museum of Anthropology and History, Mexico City).
<a href="//commons.wikimedia.org/wiki/User:Manuel_de_Corselas" title="User:Manuel de Corselas">Manuel de Corselas</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>