following year the adjacent former episcopal Felsenreitschule riding academy, carved into the Mönchsberg rock face, was converted into a theater, inaugurated with a performance of The Servant of Two Masters by Carlo Goldoni. In the 21st century, the original festival hall, suitable only for concerts, was reconstructed as a third venue for fully staged opera and concert performances and reopened in 2006 as the Haus für Mozart (House for Mozart). During the years from 1934 to 1937, famed conductors such as Arturo Toscanini and Bruno Walter conducted many performances. In 1936, the festival featured a performance by the Trapp Family Singers, whose story was later depicted in the musical The Sound of Music (featuring a scene of the Trapp Family singing at the Felsenreitschule, but inaccurately set in 1938). In 1937, Boyd Neel and his orchestra premiered Benjamin Britten's Variations on a Theme of Frank Bridge at the festival. The festival's popularity suffered a major blow as a consequence of the Anschluss, the annexation of Austria by Nazi Germany in 1938. Toscanini resigned in protest, artists of Jewish descent like Reinhardt and Georg Solti had to emigrate, and Jedermann, last performed by Attila Hörbiger, had to be dropped. Nevertheless, the festival remained in operation until in 1944 it was cancelled by the order of Reich Minister Joseph Goebbels in reaction to the 20 July plot. At the end of World War II, the Salzburg Festival reopened in summer 1945 immediately after the Allied victory in Europe. Post World War II festivals The post-war festival slowly regained its prominence as a summer opera festival, especially for works by Mozart, with conductor Herbert von Karajan becoming artistic director in 1956. In 1960 the Great Festival Hall (Großes Festspielhaus) opera house opened its doors. As this summer festival gained fame and stature as a venue for opera, drama, and classical concert presentation, its musical repertoire concentrated on Mozart and Strauss, but other works, such as Verdi's Falstaff and Beethoven's Fidelio, were also performed. Upon Karajan's death in 1989, the festival was drastically modernized and expanded by director Gerard Mortier, who was succeeded by Peter Ruzicka in 2001. In the 21st century In 2006, the festival was led by intendant Jürgen Flimm and concert director Markus Hinterhäuser. That year, Salzburg celebrated the 250th anniversary of Mozart's birth by staging all 22 of his operatic works, including two unfinished operas. All 22 were filmed and