Teotihuacan is particularly important because the Aztecs believed that it was the site of the creation of the Fifth Sun or universe in which they lived in. A number of buildings were constructed to face specific astronomical events occurring, probably just a way to calculate the passage of the year from the dry and to the wet season. Teotihuacan was one of the most remarkable cities of the ancient world.

The Aztecs appeared to have looked back to Teotihuacan as the place of origin of the era or universe in which they lived in. Teotihuacan is located in the basin of central Mexico. They believed that they can see parts of the future and past from the Aztec calendar. The Aztec Calendar was based on the mayans and that created seasons and stars.