The sculpted motifs that cover the surface of the stone refer to central components of the
Mexica cosmogony. The state-sponsored monument linked aspects of Aztec ideology such as the importance of violence and warfare, the cosmic cycles, and the nature of the relationship between gods and man. The Aztec elite used this relationship with the cosmos and the bloodshed often associated with it to maintain control over the population, and the sun stone was a tool in which the ideology was visually manifested.
Central disk In the center of the monolith is often believed to be the face of the solar deity,
Tonatiuh, which appears inside the glyph for "movement" (
Nahuatl:
Ōllin), the name of the current era. Some scholars have argued that the identity of the central face is of the earth monster,
Tlaltecuhtli, or of a hybrid deity known as "Yohualtecuhtli" who is referred to as the "Lord of the Night". This debate on the identity of the central figure is based on representations of the deities in other works as well as the role of the sun stone in sacrificial context, which involved the actions of deities and humans to preserve the cycles of time. The central figure is shown holding a human heart in each of his clawed hands, and his tongue is represented by a stone sacrificial knife (
Tecpatl).
Four previous suns or eras The four squares that surround the central deity represent the
four previous suns or eras, which preceded the present era, "Four Movement" (
Nahuatl:
Nahui Ōllin). The Aztecs changed the order of the suns and introduced a fifth sun named "Four Movement" after they seized power over the central highlands. Each era ended with the destruction of the world and humanity, which were then recreated in the next era. • The top right square represents "Four Jaguar" (
Nahuatl:
Nahui Ōcēlotl), the day on which the first era ended, after having lasted 676 years, due to the appearance of monsters that devoured all of humanity. • The top left square shows "Four Wind" (
Nahuatl:
Nahui Ehēcatl), the date on which, after 364 years, hurricane winds destroyed the earth, and humans were turned into monkeys. • The bottom left square shows "Four Rain" (
Nahuatl:
Nahui Quiyahuitl). This era lasted 312 years, before being destroyed by a rain of fire, which transformed humanity into turkeys. • The bottom right square represents "Four Water" (
Nahuatl:
Nahui Atl), an era that lasted 676 years and ended when the world was flooded and all the humans were turned into fish. The duration of the ages is expressed in years, although they must be observed through the prism of Aztec time. In fact the common thread of figures 676, 364 and 312 is that they are multiples of 52, and 52 years is the duration of one Aztec "century", and that is how they can express a certain amount of Aztec centuries. Thus, 676 years are 13 Aztec centuries; 364 years are 7, and 312 years are 6 Aztec centuries. Placed among these four squares are three additional dates, "One Flint" (
Tecpatl), "One Rain" (
Atl), and "Seven Monkey" (
Ozomahtli), and a
Xiuhuitzolli, or ruler's turquoise diadem, glyph. It has been suggested that these dates may have had both historical and cosmic significance, and that the diadem may form part of the name of the Mexica ruler,
Moctezuma II.
First ring The first concentric zone or ring contains the signs corresponding to the 20 days of the 18 months and five
nemontemi of the Aztec solar calendar (Nahuatl:
xiuhpohualli). The monument is not a functioning calendar, but instead uses the calendrical glyphs to reference the cyclical concepts of time and its relationship to the cosmic conflicts within the Aztec ideology. Beginning at the symbol just left of the large point in the previous zone, these symbols are read counterclockwise. The order is as follows:
1. cipactli – crocodile, 2.
ehécatl – wind, 3. calli – house, 4. cuetzpallin – lizard, 5. cóatl – serpent, 6. miquiztli – skull/death, 7. mázatl – deer, 8. tochtli – rabbit, 9. atl – water, 10. itzcuintli – dog, 11. ozomatli – monkey, 12. malinalli – herb, 13. ácatl – cane, 14. océlotl – jaguar, 15. cuauhtli – eagle, 16. cozcacuauhtli – vulture, 17.
ollín – movement, 18.
técpatl – flint, 19. quiahuitl – rain, 20. xóchitl – flower In the upper part of this zone, a square carved between the tails of the serpents represents the date
Matlactli Omey-Ácatl ("13-reed"). This is said to correspond to 1479, the year in which the Fifth Sun emerged in Teotihuacan during the reign of Axayácatl, and at the same time, indicating the year in which this monolithic sun stone was carved.
Edge of stone The edge of the stone measures approximately 20 cm (8 inches) and contains a band of a series of dots as well as what have been said to be flint knives. This area has been interpreted as representing a starry night sky. == History of interpretations ==