Matrícula de Huexotzinco is a census of the villages in the province of Huexotzinco (also seen as Huejotzingo). This very large document originally was comprised of more than 440 folios, six of which have since been lost. The census is divided into three parts: a text in Spanish introducing the census, the pictorial census, and an analysis in Spanish of the results. Each part starts with a page containing the glyph of the village name, followed by a registry of all married men, the elderly, widows and widowers, the sick, and those who had died since the previous census. Each page depicts a tecpan (the official administrative building of the tribe) and 20 heads, to which notes in onomastic glyphs were added. After every five pages (or tecpans) is a figure representing a particular family or group. The occupations of the people listed also are noted and the names of people given in Spanish and Nahautl. A text in Spanish summarizes the results of the census. The Matrícula is an extraordinarily important document for the study of Mexico in the early colonial period. Its figures and glosses in both Nahautl and Spanish have proved extremely useful in deciphering other Aztec pictorial documents. The census also contains much detailed information about the economy, social organization, language, history, people, and art of Mexico in this period.