Prose Tristan
 The first part of the work stays closer to the traditional story as told by verse writers like Béroul and Thomas of Britain, but many episodes are reworked or altered entirely. Tristan's parents are given new names and backstories, and the overall tone has been called "more realistic" than the verse material though there are moments where characters sing. Tristan's guardian Governal takes him to France, where he grows up at the court of King Pharamond. He later arrives at the court of his uncle Mark, King of Cornwall, and defends his country against the Irish warrior Morholt. Wounded in the fight, he travels to Ireland where he is healed by Iseult, a renowned doctor and Morholt's niece, but he must flee when the Irish discover he has killed their champion. He later returns, in disguise, to seek Iseult as a bride for his uncle. When they accidentally drink the love potion prepared for Iseult and Mark, they engage in a tragic affair that ends with Tristan being banished to the court of Hoel of Brittany. He eventually marries Hoel's daughter, also named Iseult. Especially after this point, however, the traditional narrative is continually interrupted for side adventures by the various characters and episodes serving to "Arthurianize" the story. Notably, Tristan's rivalry with the Saracen knight Palamedes is given substantial attention. Additionally, in the long version, Tristan leaves Brittany and returns to his first love, and never sees his wife again, though her brother Kahedin remains his close companion. Tristan is compared frequently to his friend Lancelot in both arms and love, and at times even unknowingly engages him in battles. He becomes a Knight of the Round Table (taking Morholt's old seat) and embarks on the Quest for the Holy Grail before abandoning the idea to stay with Iseult at Lancelot's castle. The Grail Quest has been a source of controversy regarding the Tristan en prose. Instead of writing new material, the author chose to insert (or interpolate) the entire Queste del Saint Graal from the Vulgate Cycle into the Tristan story. The result of this copying undermines the sanctity of the Vulgate Quest itself. Manuscripts which do not include the Grail material preserve the earlier version of the lovers' deaths, while the longer versions have Mark kill Tristan while he plays the harp for Iseult, only to see her die immediately afterwards.