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
Eithne (opera) Eithne (opera) Eithne, also known as "Éan an Cheoil Bhinn" (The Bird of Sweet Music), is considered by many critics to be the first full-scale opera written and performed in the Irish language. It was written by English/Irish composer Robert O'Dwyer. The work saw its first performance at the Round Room in Dublin's Rotunda during the Oireachtas na Gaeilge, a festival of Irish culture, in 1909, conducted by the composer. It was performed again in May 1910 at the Gaiety Theatre, Dublin. The opera, based on a Gaeilge libretto written by Galway Reverend Thomas O'Kelly, covers three acts and includes