The University Libraries' Mesoamerican codices collection consists of high quality facsimiles held in Special Collections, mass published facsimiles found on our shelves, early microfilm proxies of originals, and scholarly interpretations.
This is one of the five divinatory screenfold almanacs of the Borgia Group. The first three sections on the obverse each present a different aspect of the 260-day tonalmatl calendar. The fourth section on the reverse is in a different style and its interpretation is uncertain. It includes deities, what may be offerings, and sets of bar-and-dot numerals.