Der Stein der Weisen Tamino and Sarastro). "Der Stein der Weisen" may have provided a model for that work, as the two have a similar structure and source. The work was initially popular, but was largely absent from the standard repertoire for the two centuries after 1814, American musicologist David Buch announced the discovery of a Viennese score with attributions to all five composers. This was taken by some to indicate that "Der Stein der Weisen" was a previously unknown Mozart work, although in fact only a duet ("Nun liebes Weibchen", known as the "cat duet") and two sections of the act 2 finale
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