Hildegard Rütgers 1963. Between 1963 and 1965 she performed at the Salzburg Festival, the part of "Die Vertraute" (Her confidante) in a production of "Elektra" by Richard Strauss, conducted by Herbert von Karajan, alongside Astrid Varnay in the title role, and Martha Mödl, Hildegard Hillebrecht, James King and Eberhard Waechter in leading parts. The production of Mozart's "Die Zauberflöte" at the Salzburg Festival, with Rütgers as the Third Boy, was filmed and released as a made-for-television-movie in 1964. She appeared alongside Walter Kreppel as Sarastro, Roberta Peters as the Queen of the Night, Pilar Lorengar and Waldemar Kmentt as Pamina and Tamino,
Wolfgang Amadeus Mozart and Prague as both a composer and a performer. The great success of this visit generated a commission from the impresario Pasquale Bondini for another opera, which like "The Marriage of Figaro" was to have a libretto by Mozart's great collaborator Lorenzo Da Ponte. Mozart came to Prague for the second time to help supervise the first performance of his opera "Don Giovanni". He arrived on 4 October 1787 and stayed until 12 or 13 November. The premiere of the opera was supposed to have taken place on 15 October, but could not be arranged until 29 October 1787. The work was