The Madrid Codex (also known as the Tro-Cortesianus Codex or the Troano Codex)[1] is one of three surviving pre-Columbian Maya books dating to the Postclassic period of Mesoamerican chronology (circa 900–1521 AD).[2] A fourth codex, named the Grolier Codex, was discovered in 1965.[3] The Madrid Codex is held by the Museo de América in Madrid and is considered to be the most important piece in its collection.