Тристан и Изольда
The most famous "romans" are those of the "Matter of Britain" dealing with Arthurian romance, the stories of Tristan and Iseult, the heroic legend of the doomed utopia of Camelot and the Holy Grail. Much of this material derives from Breton (Celtic) legends. The most important of these writers was Chrétien de Troyes (twelfth century).