Is the greatest knight of King Arthur's court and lover of Arthur's wife, Queen Guinevere, best known from Sir Thomas Malory's Le Morte D'Arthur (1469 CE). The character was first developed by the French poet Chretien de Troyes (l. c. 1130-1190 CE) in his Lancelot or the Knight of the Cart (c. 1177 CE) who introduced Lancelot's affair with Guinevere as well as his reputation as a famously skilled warrior.

Sir Lancelot ( kills big snake)
In Malory's work, Lancelot's affair with Guinevere finally destroys the unity of Arthur's Round Table of noble knights and allows the villain Mordred to usurp the throne. Mordred's actions lead to the destruction of the kingdom and the deaths of most of the greatest knights while Arthur, mortally wounded, is taken away to the mystical isle of Avalon. The Lancelot-Guinevere love affair is among the most famous in world literature and defines the lovers even as they struggle to resist their passion, rendering them finally heroic figures brought down by the fatal flaw of their relationship.

