Cosmology
The Maya believed that 13 heavens were arranged in layers above the earth, which itself rested on the back of a huge crocodile or reptilian monster floating on the ocean. Under the earth were nine underworlds, also arranged in layers. Thirteen gods, the Oxlahuntiku, presided over the heavens; nine gods, the Bolontiku, ruled the subterranean worlds. These concepts are closely akin to those of the Postclassic Aztec, but archaeological evidence, such as the nine deities sculptured on the walls of a 7th-century crypt at Palenque, shows that they were part of the Classic Maya cosmology.
Time was an all-important element of Maya cosmology. The priest-astronomers viewed time as a majestic succession of cycles without beginning or end. All the time periods were considered as gods; time itself was believed to be divine.