Franz Xaver Gerl have been the composer of the aria "Ein Weib ist das herrlichste Ding", for which Mozart wrote a set of variations for piano, K. 613 (the composer may instead have been another singer-composer in the troupe, Benedikt Schack). Mozart gradually came to participate more in the activities of the Schikaneder troupe, culminating in his opera "The Magic Flute" (1791), with libretto by Schikaneder. Gerl premiered the role of Sarastro, and continued to sing this part in many performances through 1792. He left Schikaneder's troupe in 1793. Gerl may have been a participant in a rehearsal of Mozart's "Requiem" on the
Mozart and Salieri (opera) Solodovnikov Theater in Moscow, presented by the Moscow Private Russian Opera, Moscow on 7 December 1898 (O.S. 25 November). The conductor was Iosif Truffi and scenic designer was Mikhail Vrubel. Feodor Chaliapin, who originated the role of Salieri, claimed to have often sung the piece as a monodrama, as the role of Mozart goes no higher than g and was within his range. In Britain the first UK performance was presented on 11 October 1927, again with Chaliapin as Salieri, while the first U.S. one took place in Forest Park, Pennsylvania, in 1933. A recent UK revival took place in