Considered by many scholars the finest extant Mexican codex and one of the most important original sources for the study of pre-Columbian religion, the Codex Borgia is a work of profound beauty, filled with strange and evocative images related to calendrical, cosmological, ritual, and divinatory matters. Generally similar to such Mixtec manuscripts as the Codex Nuttall, the Codex Borgia is thought to have its origin (ca. A.D. 1400) in the southern central highlands of Mexico, perhaps in Puebla or Oaxaca. It is most probably a religious document that once belonged to a...