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
Wolfgang Amadeus Mozart and Prague Wolfgang Amadeus Mozart and Prague There is no question that the Praguers of the late eighteenth century exhibited a special appreciation for the music of Wolfgang Amadeus Mozart, even though, as recently pointed out by Daniel E. Freeman, confirmations of this fact attributed to Mozart himself in sayings such as "" ("My Praguers understand me") have only come down to posterity second or third hand. Perhaps the most valuable direct testimony that attests to the discernment of the musical public in Prague with regard to Mozart's music comes from Lorenzo Da Ponte, the librettist of Mozart's opera "Don Giovanni", which