Fidelio work on the libretto by Georg Friedrich Treitschke. This version was first performed at the Kärntnertortheater on 23 May 1814, again under the title "Fidelio". The 17-year-old Franz Schubert was in the audience, having sold his school books to obtain a ticket. The increasingly deaf Beethoven led the performance, "assisted" by Michael Umlauf, who later performed the same task for Beethoven at the premiere of the Ninth Symphony. The role of Pizarro was taken by Johann Michael Vogl, who later became known for his collaborations with Schubert. This version of the opera was a great success, and "Fidelio" has been
Aladdin (opera) Aladdin (opera) Aladdin, Op. 43, is an opera by the Swedish composer Kurt Atterberg, to a libretto written by and . Two versions exist, in Swedish and German. The opera is based on the story, "Aladdin's Magic Lamp" from "One Thousand and One Nights". It was first performed on 18 March 1941 at the Royal Swedish Opera, Stockholm. The idea for the composition was born in August 1936 when the composer met the librettists in Garmisch. The libretto was largely finished when Atterberg began composing the piano score on 15 July 1937. On 24 August 1940 the piano score was