The José María Lafragua Historial Library from BUAP presents the two colonial codices from the 16th century: the Sierra- Texupan and the Yanhuitlan. Both were produced in communities of the Mixteca Alta in Oaxaca. They were part of the Puebla Fine Arts Academy’s collection. Its library, archive and engravings were trasfered to the University of Puebla in the 20th century.After the Conquest, a large number of documents were created using European paper as support; they were also created in a different format: the codex, replacing therefore the strips of the folded screen. Texts in latin of Castilian characters were included or in other native languages. Images in European style were also painted; This documents are now known as mixed codices. That is the case of the Sierra-Texupan and the Yanhuitlán.