Fidelio by Ferdinando Paer (a score of which was owned by Beethoven). Beethoven published the 1806 libretto and, in 1810, a vocal score under the title "Leonore", and the current convention is to use the name "Leonore" for both the 1805 (three-act) and 1806 (two-act) versions and "Fidelio" only for the final 1814 revision. The first version with a three-act German libretto adapted by Joseph Sonnleithner from the French of Jean-Nicolas Bouilly premiered at the Theater an der Wien on 20 November 1805, with additional performances the following two nights. The success of these performances was hindered by the fact that
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