Perceforest or Le Roman de Perceforest is an anonymous prose chivalric romance, written in French around 1340, with lyrical interludes of poetry, that describes a fictional origin of Great Britain and provides an original genesis of the Arthurian world. The lengthy work in six books takes its inspiration from the works of Geoffrey of Monmouth, Wace, Orosius and Bede, the Lancelot-Grail cycle, the Alexander Romance genre, Roman historians, medieval travellers, and oral tradition. Perceforest forms a late addition to the collection of narratives with loose connections both to the Arthurian Romance and the feats of Alexander the Great. An extract from Geoffrey of Monmouth's History of the Kings of Britain serves as a preface, in which refugees from Troy flee to the island of Britain, and establish a new kingdom. Unlike in Geoffrey's narrative, however, that dynasty eventually produces a series of weak rulers who usher their kingdom into decline. Alexander of Macedon and his Greek forces are on their way to the coronation of India's new king when they are blown off course in a storm. They arrive in Britain and discover the poor state of the country. Alexander takes charge and appoints the brothers Betis and Gadifer as kings of England and Scotland, respectively. He then leaves for Babylon. Betis renames himself "Perceforest," as one who dares to "pierce" and "purge" the evil forest to root out Darnant the Enchanter and bring freedom and justice to the land. Perceforest and Gadifer take on Darnant's descendants, a group of magic-wielding knights, and drive them out. However, the successful leadership of the two brothers is fated not to last, and native English and Scottish knights are forced to step into the breach to quell rebellion and fend off invasion. Perceforest eventually regains his powers and, as king of Britain, creates a chivalric society. Specifically, he founds the Franc Palais of free equals with the best knights, paralleling the Round Table.