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
Fidelio the beautiful weather. Marzelline similarly begs him, and Rocco agrees to distract Pizarro while the prisoners are set free. The prisoners, ecstatic at their temporary freedom, sing joyfully ("O welche Lust"—"O what a joy"), but remembering that they might be caught by the prison's governor Pizarro, are soon quiet. After meeting with Pizarro, Rocco reenters and tells Fidelio that Pizarro will allow the marriage, and Fidelio will also be permitted to join Rocco on his rounds in the dungeon ("Nun sprecht, wie ging's?"—"Speak, how did it go?"). Rocco and Fidelio prepare to go to Florestan's cell, with the knowledge that