 Codices were used to record a variety of types of information, including astronomical knowledge, religious calendars, genealogies of the ruling families, cartography, and tribute collection.Temples and schools were the first "libraries" in the region, as this is where the codices were stored and used as educational materials.During the Golden Period of Maya Civilization also called the Classic Period (250 AD-900 AD), the Maya were believed to have large libraries filled with books.