The Maya Codex of Mexico is a fragmentary Postclassic Maya screenfold book, ten surviving pages painted on lime-coated bark paper, depicting deities associated with the planet Venus and a ritual calendar. It surfaced in the 1960s in the hands of a Mexican collector, Josue Saenz, having been dug up by looters rather than excavated, and was shown at the Grolier Club in New York in 1971, which gave it its former name, the Grolier Codex. That provenance and its unusual style led many specialists to condemn it as a forgery.
The Maya Codex of Mexico, formerly and still sometimes called the Grolier Codex after the New York club that first exhibited it in 1971, is reportedly said to have been found in a cave in Chiapas, Mexico, though, as with several looted or privately surfaced manuscripts recorded in this atlas, its exact recovery circumstances cannot be independently confirmed. The manuscript's original discovery narrative, presented when it was first shown to scholars in New York in 1971, included claims about a cave find in Chiapas that could not be independently verified at the time, contributing to decades of scholarly caution about the object that the later radiocarbon dating and 2016 technical study only partially resolved.