Arthur is a fabled Britishking who figures in many legends. He appears as the ideal of kingship both in war and peace; even in modern times he has been ranked as one of the 100 Greatest Britons of all times. Over time, the popularity of the stories of King Arthur have captured interest far beyond his being the legendary hero of one nation. Countless new legends, stories, revisions, books, and films have been produced in Europe and the United States of America that unabashedly enlarge on and expand the fictional stories of King Arthur.
In the Arthurian legend, Sir Lancelot (Lancelot du Lac, also Launcelot) is one of the Knights of the Round Table. In most of the French prose romances and works, he is characterized as the greatest and most trusted of Arthur's knights, and plays a part in many of Arthur's victories – but Arthur's eventual downfall is also brought about in part by Lancelot, whose affair with Arthur's wife Guinevere destroys the unity of Arthur's court.
Lancelot is a popular character, and has been the subject of many poems, stories, plays, and films as a famous figure in the Arthurian cycle of romances. To the great majority of English readers the name of no knight of King Arthur's court is so familiar as is that of Sir Lancelot. The mention of Arthur and the Round Table at once brings him to mind to moderns as the most valiant member of that brotherhood and the secret lover of the Queen. Lancelot, however, is not an original member of the cycle, and the development of his story is still a source of considerable disagreement between scholars.