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The Codex Sierra is a colonial Mesoamerican account book from Santa Catalina Texupa (in the modern Mexican state of Oaxaca), covering the years from 1550 to 1564. It uses both alphabetic and pictorial modes of writing. Though Texupa is a Mixtec and Chocho community, the text is written in Nahuatl, albeit with some Mixtec words. The pictorial portion likewise uses Mixtec conventions, such as the "A-O" year sign.
References
Codex Sierra Wikipedia(Text) CC BY-SA