Which opera in two acts by Wolfgang Amadeus Mozart did Franz Xaver Gerl sang the role of Sarastro in the premiere of
Franz Xaver Gerl:  He sang the role of Sarastro in the premiere of Mozart's opera "The Magic Flute". The Magic Flute: The Magic Flute (German: Die Zauberflöte ), K. 620, is an opera in two acts by Wolfgang Amadeus Mozart to a German libretto by Emanuel Schikaneder.
The Magic Flute