Opera heard in his earlier operas such as "Der fliegende Holländer", "Tannhäuser" and "Lohengrin"; and he was prepared to violate accepted musical conventions, such as tonality, in his quest for greater expressivity. In his mature music dramas, "Tristan und Isolde", "Die Meistersinger von Nürnberg", "Der Ring des Nibelungen" and "Parsifal", he abolished the distinction between aria and recitative in favour of a seamless flow of "endless melody". Wagner also brought a new philosophical dimension to opera in his works, which were usually based on stories from Germanic or Arthurian legend. Finally, Wagner built his own opera house at Bayreuth with part
Richard Wagner Trevor Howard in "Ludwig" (1972); Paul Nicholas in "Lisztomania" (1975); and Richard Burton in "Wagner" (1983). Jonathan Harvey's opera "Wagner Dream" (2007) intertwines the events surrounding Wagner's death with the story of Wagner's uncompleted opera outline "Die Sieger (The Victors)". Since Wagner's death, the Bayreuth Festival, which has become an annual event, has been successively directed by his widow, his son Siegfried, the latter's widow Winifred Wagner, their two sons Wieland and Wolfgang Wagner, and, presently, two of the composer's great-granddaughters, Eva Wagner-Pasquier and Katharina Wagner. Since 1973, the festival has been overseen by the Richard-Wagner-Stiftung (Richard Wagner Foundation), the