Fidelio Op. 72, is a German opera with spoken dialogue in two acts by Ludwig van Beethoven. It is his only opera. The German libretto was prepared by Joseph Sonnleithner.
The opera tells how Leonore, disguised as a prison guard named "Fidelio", rescues her husband Florestan from death in a political prison.
This 1978 recording stars Gundula Janowitz and Rene Kollo. Leonard Bernstein conducts.