Codex Borgia. Pre-Columbian, also known as Codex Borgianus, Manuscrit de Veletri and Codex Yohualli Ehecatl, is a pre-Columbian Middle American pictorial manuscript from Central Mexico with a calendrical and ritual content, dating from the 16th century. It is named after the 18th century Italian Cardinal, Stefano Borgia, who owned it before it was acquired by the Vatican Library after the Cardinal's death in 1804..