The Derveni papyrus is an ancient Macedonian papyrus roll that was found in 1962. It is a philosophical treatise that is an allegorical commentary on an Orphic poem, a theogony concerning the birth of the gods, produced in the circle of the philosopher Anaxagoras. The roll dates to around 340 BC, during the reign of Philip II of Macedon, making it Europe's oldest surviving manuscript. The poem itself was composed near the end of the 5th century BC, and "in the fields of Greek religion, the sophistic movement, early philosophy, and the origins of literary criticism it is unquestionably the most important textual discovery of the 20th century." While interim editions and translations were published over the subsequent years, the manuscript as a whole was finally published in 2006.