Codex Chimalpopoca or Códice Chimalpopoca is a postconquest cartographic Aztec codex[1] which is officially listed as being in the collection of the Instituto Nacional de Antropología e Historia located in Mexico City under "Collección Antiguo no. 159". It is best known for its stories of the hero-god Quetzalcoatl.[2] The current whereabouts of the codex are unknown. It appears to have been lost in the mid-twentieth century.[3] Study of the codex is therefore necessarily provided only through copies and photographs. The codex consists of three parts, two of which are more important, one that regards the pre-Hispanic history of Central Mexico, the Anales de Cuauhtitlan and the other that regards the study of Aztec cosmology, the Leyenda de los Soles.