Fidelio Fidelio Fidelio (originally titled ; English: "Leonore, or The Triumph of Marital Love"), Op. 72, is Ludwig van Beethoven's only opera. The German libretto was originally prepared by Joseph Sonnleithner from the French of Jean-Nicolas Bouilly, with the work premiering at Vienna's Theater an der Wien on 20 November 1805. The following year, helped shorten the work from three acts to two. After further work on the libretto by Georg Friedrich Treitschke, a final version was performed at the Kärntnertortheater on 23 May 1814. By convention, both of the first two versions are referred to as "Leonore". The libretto, with
Fidelio to be broadcast in the USA, over the NBC radio network, in December 1944, by the NBC Symphony Orchestra, featuring soloists from the Metropolitan Opera (though a shortwave broadcast of one act, conducted by Toscanini, had earlier been relayed from a 16 August 1936 performance at Salzburg.) Divided into two consecutive broadcasts, the 1944 performances were later issued by RCA Victor on LPs and CDs. "Fidelio" was the first opera performed in Berlin after the end of the World War II, with the Deutsche Oper staging it under the baton of Robert Heger at the only undamaged theatre, the Theater