 Though it is speculated that the Aztecs had libraries, not much is known about where the Aztecs actually kept their records.Through surviving codices and accounts from Spaniards, it is known that the Aztec, kept records on facets of life, including events, genealogical histories, practices, math, land ownership, maps, and civil and criminal laws.In fact, at the time of the conquest, the Aztecs had just begun to codify their [customary] laws into a more formal written form.” The Aztecs collected information in the form of glyphs or picture and images on books (called "amoxtli" in the Nahuatl language).