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,
Mozart and Salieri (opera) on his "Requiem", which a stranger in black commissioned from him. Mozart recalls Salieri's collaboration with Pierre Beaumarchais and asks if it could be true that Beaumarchais once poisoned someone, for genius and criminality are surely incompatible. Salieri then surreptitiously pours poison into Mozart's drink. Mozart begins to play at the keyboard, as Salieri begins to cry. Mozart sees this, but Salieri urges Mozart to continue. Mozart begins to feel ill, and leaves. Salieri ends the opera pondering Mozart's belief that a genius could not murder: did not Michelangelo kill for his commissions at the Vatican, or were those idle