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The Chavero Codex of Huexotzingo of 1578 documents a judicial proceeding against officials who collected excessive taxes in Huexotzingo , located in today 's Puebla , Mexico .. These taxes , paid in `` money , maize , and shirts and blankets '' were collected in `` the 21 districts of Huexotzingo between 1571 and 1577 . ''. Some of the taxes were used to build a church in the San Salvador district .. The numbers in the codex from the surveys submitted by officials are recorded in illustrations `` using the Mesoamerican numeric system , with some variations characteristic of the Mexica system . ''. codex. codex. Mesoamerican numeric system. Maya numerals. A book on the codex , Codice Chavero de Huexotzingo  : proceso a sus oficiales de republica , won the 2005 `` Premio INAH Francisco Javier Clavijero . ''. codex. codex. Historian Alfredo Chavero donated the codex to the National Museum of Mexico in 1906 .. codex. codex. Alfredo Chavero. Alfredo Chavero. National Museum of Mexico. Museo Nacional de Antropologia