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
Found and Lost (opera) Found and Lost (opera) Found and Lost is a one-act opera by Emily Hall, first performed in January 2016, which "straddles the worlds of opera, art installation and promenade theatrical event". The opera, which lasts about 50 minutes, is to a libretto by Matthew Welton. It is described as "an opera installation...written using found texts within Corinthia Hotel London" – these texts include for example checklists for room service staff. The opera was created by the composer whilst she was an artist-in-residence at the Corinthia Hotel in London. The composer's brief was to write an opera to take place in