Place of Origin
The city of Mexico-Tenochtitlan. It has been hypothesized that the historical portion was added later in the region of Puebla.
A reference point is the period of 1562-1563 which is the ending chronology of the codex. The images appear to have been painted from 1554-1555 and the glosses until 1563.
This colonial codex contains three major sections containing a common theme. It is possible that the codex was solicited by the Spanish civil and religious authorities to better understand the history and religion of the Mexica-Tenochcas.
Part 1 - Folios 1r-7r
The first part of the codex depicts a count of various ceremonies related to the cempoalxihuitl with each period lasting a duration of twenty days.
Part 2 - Folios 8r-24r
The second part of the codex is a tonalamatl. The tonalamatl includes the 260 days of the tonalpohualli broken up into the 20 trecena periods. Attached to each trecena is an image of the teotl assigned to that period. In addition, each of the thirteen days of the trecena period have an attached fate with "i" representing indifferente, "b" representing bueno, and "m" representing malo. In addition, a patron is shown for each of the days.
Part 3 - Folios 25r-50r
The third part of the codex is a historical record depicting the entrance of the Mexica into Mexico as chichimecas. The record continues depicting events revolving around Tenochtitlan. 
- , Arqueologia Mexicana, Volume XVIII, Number 108, pages 84-85.