Fidelio Fidelio Fidelio (originally titled ; English: "Leonore, or The Triumph of Marital Love"), Op. 72, is Ludwig van Beethoven's only opera. The German libretto was originally prepared by Joseph Sonnleithner from the French of Jean-Nicolas Bouilly, with the work premiering at Vienna's Theater an der Wien on 20 November 1805. The following year, helped shorten the work from three acts to two. After further work on the libretto by Georg Friedrich Treitschke, a final version was performed at the Kärntnertortheater on 23 May 1814. By convention, both of the first two versions are referred to as "Leonore". The libretto, with
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