"The deeply resonant love story of Sir Lancelot and King Arthur's wife, Queen Guenevere, has had enduring appeal ever since it was invented in the 12th-century by the French writer Chretien de Troyes. The protagonists became a model of ill-fated adulterers whose irresistible love led not only themselves but their entire world to perdition. The tale has been told and retold over the years in many languages and forms; the most provocative and elaborate version is in the immense suite of early-13th-century French narratives collectively called the Lancelot-Grail or Arthurian Vulgate Cycle. Related here is the whole wondrous, adventure-filled, mythic history of Arthur and his chivalric kingdom. The anonymous author of the massive section devoted to Lancelot expanded the triangle Arthur-Guenevere-Lancelot into a rectangle, adding a figure named Galehaut, Lord of the Distant Isles, a powerful political and military foe to Arthur and a rival to Guenevere for the love of Lancelot.