In 1805 Beethoven wrote his only opera. The next spring it had two performances but was then not performed again for another eight years. Beethoven had made several changes to the opera which became known as "Fidelio". The overture that he had written for the 1806 performance is now known as "Leonore 3" and is usually performed separately at concerts. The opera is a “rescue” opera, a typical French kind of opera describing a man who is imprisoned and rescued by his lover who disguises herself as a man and manages to get into the prison.