The Paris Codex (also known as the Codex Peresianus and Codex Pérez) is one of four surviving generally accepted pre-Columbian Maya books dating to the Postclassic Period of Mesoamerican chronology (c. 900–1521 AD). The document is very poorly preserved and has suffered considerable damage to the page edges, resulting in the loss of some of the text. The codex largely relates to a cycle of thirteen 20-year kʼatuns and includes details of Maya astronomical signs.