Matter of Britain in the context of "Green Knight"

Myth is a genre of folklore consisting primarily of narratives that play a fundamental role in a society. For scholars, this is totally different from the ordinary sense of the term myth, meaning a belief that is not true, as the veracity of a piece of folklore is entirely irrelevant to determining whether it constitutes a myth.

Myths are often endorsed by religious and secular authorities, and may be natural or supernatural in character. Many societies group their myths, legends, and history together, considering myths and legends to be factual accounts of their remote past. In particular, creation myths take place in a primordial age when the world had not achieved its later form. Origin myths explain how a society's customs, institutions, and taboos were established and sanctified. National myths are narratives about a nation's past that symbolize the nation's values. There is a complex relationship between recital of myths and the enactment of rituals.

King Arthur (Welsh: Brenin Arthur; Cornish: Arthur Gernow; Breton: Roue Arzhur; French: Roi Arthur) was a legendary king of Britain. He is a folk hero and a central figure in the medieval literary tradition known as the Matter of Britain.

In Welsh sources, Arthur is portrayed as a leader of the post-Roman Britons in battles against the Anglo-Saxons in the late-5th and early-6th centuries. He first appears in two early medieval historical sources, the Annales Cambriae and the Historia Brittonum, but these date to 300 years after he is supposed to have lived, and most historians who study the period do not consider him a historical figure. His name also occurs in early Welsh poetic sources, such as Y Gododdin. The character developed through Welsh mythology, appearing either as a great warrior defending Britain from human and supernatural enemies or as a magical figure of folklore, and was sometimes associated with the Welsh otherworld Annwn.

Historia regum Britanniae (The History of the Kings of Britain), originally called De gestis Britonum (On the Deeds of the Britons), is a fictitious account of British history, written around 1136 by Geoffrey of Monmouth. It chronicles the lives of the kings of the Britons over the course of two thousand years, beginning with the Trojans founding the British nation and continuing until the Anglo-Saxons assumed control of much of Britain around the 7th century. It is one of the central pieces of the Matter of Britain.

Although taken as historical truth until the 16th century, it is now considered to have no value as history. When events described, such as Julius Caesar's invasions of Britain, can be corroborated from contemporary histories, Geoffrey's account can be seen to be wildly inaccurate. It remains, however, a valuable piece of medieval literature, which contains the earliest known version of the story of King Lear and his three daughters, and helped popularise the legend of King Arthur.

According to the medieval poet Jean Bodel, the Matter of Rome (French: matière de Rome; Latin: Res Romana) is the literary cycle of Greek and Roman mythology, together with episodes from the history of classical antiquity, focusing on military heroes like Alexander the Great and Julius Caesar. Bodel's division of literary cycles also included the Matter of France and the Matter of Britain (although "non-cyclical" romance also existed). The Matter of Rome includes the Matter of Troy, consisting of romances and other texts based on the Trojan War and its legacy, including the adventures of Aeneas.

The wild man (German: Wilder Mann, der Wilde Mann), wild man of the woods is a mythical figure and motif resembling a hairy human that appears in the art and literature of medieval Europe. Generally considered large-statured race of humans who are hairy all over its body, living in the wilderness or woodlands. They are often thought to be covered with moss, or wear green or vegetative clothing, and iconically wield a club or hold an uprooted tree as a staff. They also occur in female versions as wild women.

The Wilde Mann (Middle High German: wilde man) is attested in Middle High German literature, particularly German heroic epics while the female Wilde Weib (wildez wîp) figures in the Arthurian works, typically appear as adversaries. These beings are also called by names meaning "wood men" and in older forms of the language, "wood wife". In Middle English a corresponding term for the wild man is woodwose or wodewose.