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 is what moves us to tears. His "Fidelio" has more of the Mass than of the Opera to it; the sentiments it expresses come from the sphere of the sacred, and preach a 'religion of humanity' which we never found so beautiful or necessary as we do today, after all we have lived through. Herein lies the singular power of this unique opera... Independent of any historical consideration ... the flaming message of "Fidelio" touches deeply. We realize that for us Europeans, as for all men, this music will always represent an appeal to our conscience. On 5 November 1955,