The Codex Vaticanus is the only manuscript belonging to the Codex-Borgia-group that has retained the original look of an old Mexican illuminated manuscript; on both sides painted bands of leperello deerskin, and outermost pages that are glued to reinforced wooden covers.
From a composition and content point of view, this codex is chiefly a collectors’ manuscript of religious and prophetic content. It was a reference book for Priests or fortune-tellers in order that they could determine the different times and its variations, in particular the holy year of 260 days (Tonalpohualli) and its subdivisions, all according to their mythological and religious meaning as well as to powerful deities and godly aspects.