<Tr> <Th> Discovered </Th> <Td> 17 December 1790 at El Zócalo, Mexico City </Td> </Tr> <Tr> <Th> Present location </Th> <Td> National Anthropology Museum, Mexico City </Td> </Tr> <P> The Sun Stone, Stone of the Five Eras, or sometimes (erroneously) called Aztec calendar stone is a late post-classic Mexica sculpture housed in the National Anthropology Museum in Mexico City, and is perhaps the most famous work of Aztec sculpture . The stone is 358 centimetres (11.75 ft) in diameter and 98 centimetres (3.22 ft) thick, and it weighs about 24 tons . Shortly after the Spanish conquest, the monolithic sculpture was buried in the Zócalo, the main square of Mexico City . It was rediscovered on December 17, 1790 during repairs on the Mexico City Cathedral . Following its rediscovery, the calendar stone was mounted on an exterior wall of the Cathedral, where it remained until 1885 . Most scholars think that the stone was carved some time between 1502 and 1521, though some believe that it is several decades older than that . </P> <P> The sculpted motifs that cover the surface of the stone refer to central components of the Mexica cosmogony . </P>

How much did the piedra del sol weight