Aztec cosmology described 13 levels of heaven above the earth.
These upper realms were known collectively as the Thirteen Heavens, or Topan, in Nahua religious thought. Each level could be associated with particular gods, celestial bodies, winds, colors, or cosmic functions. The heavens were not simply a modern-style sky; they formed a structured divine geography above the earthly world.
The highest level was Omeyocan, meaning “Place of Duality.” It was regarded as the dwelling of Ometeotl, the dual creative principle expressed through Ometecuhtli, the masculine Lord of Duality, and Omecihuatl, the feminine Lady of Duality. Other levels included regions associated with the moon, stars, storms, fire, and the creator deities.
The number 13 is often contrasted with the nine levels of Mictlan, the underworld. However, the boundaries between realms could vary among Nahua traditions and colonial-era accounts. That variation does not change the standard quiz answer: the commonly cited Aztec model has 13 heavens and nine underworld levels.