Aztec Sun Stone, National Museum of Anthropology, Mexico City
The Aztec Sun Stone (or Calendar Stone) depicts the five consecutive worlds of the sun from Aztec mythology. The stone is not, therefore, in any sense a functioning calendar, but rather it is an elaborately carved solar disk, which for the Aztecs and other Mesoamerican cultures represented rulership. At the top of the stone is a date glyph (13 reed) which represents both the beginning of the present sun, the 5th and final one according to mythology, and the actual date 1427 CE, thereby legitimizing the rule of Itzcoatl and creating a bond between the divine and mankind.
The stone was discovered in December 1790 CE in the central plaza of Mexico City and now resides in the National Museum of Anthropology in that city. The richly carved basalt stone was once a part of the architectural complex of the Temple Mayor and measures 3.58 metres in diameter, is 98 centimetres thick, and weighs 25 tons. The stone would originally have been laid flat on the ground and possibly anointed with blood sacrifices.