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
Det sjungande trädet (opera) Det sjungande trädet (opera) Det sjungande trädet ("The Singing Tree") Op.110 is an opera in two acts by the Finnish composer Erik Bergman. The Swedish-language libretto, based on a Swedish fairy tale, was written by Bo Carpelan. The opera premiered on 3 September 1995 at the Helsinki Opera House. "Det sjungande trädet" was Bergman's only full-length opera and was composed between 1986 and 1988 as a commission from the Finnish National Opera. Prior to that, the closest he had come to the operatic genre was his 1971 "Samothrake" Op. 69, a 12-minute "musico-dramatic tableau" for speaker, mixed choir, and dancers.