The Post-Vulgate Cycle, also known as the Post-Vulgate Arthuriad, the Post-Vulgate Roman du Graal (Romance of the Grail) or the Pseudo-Robert de Boron Cycle, is one of the major Old French prose cycles of Arthurian literature from the early 13th century. It is considered essentially a rewriting of the earlier and more popular Vulgate Cycle (also known as the Lancelot-Grail cycle), with much left out but also much added, including characters and scenes from the Prose Tristan. The cycle did not survive in its entire original form, but has been reconstructed from fragments in several medieval languages.