The Lancelot-Grail Cycle (a modern title invented by Ferdinand Lot), also known as the Vulgate Cycle (from the Latin editio vulgata, "common version", a modern title invented by H. Oskar Sommer) or the Pseudo-Map Cycle (named so after Walter Map, its pseudo-author), is an early 13th-century French Arthurian literary cycle consisting of interconnected prose episodes of chivalric romance originally written in Old French. The work of unknown authorship, presenting itself as a chronicle of actual events, retells the legend of King Arthur by focusing on the love affair between Lancelot and Guinevere as well as the religious quest for the Holy Grail. The cycle expands on Robert de Boron's "Little Grail Cycle" and the works of Chrétien de Troyes, previously unrelated to each other, by supplementing them with additional details and side stories, as well as lengthy continuations, while tying the entire narrative together into a coherent single tale. Its alternate titles include Philippe Walter's 21st-century edition Le Livre du Graal ("The Book of the Grail"). There is no unity of place in the story, but most of...