Fidelio the opera which, thanks to the music of Beethoven, gives us comfort and courage... Certainly, "Fidelio" is not an opera in the sense we are used to, nor is Beethoven a musician for the theater, or a dramaturgist. He is quite a bit more, a whole musician, and beyond that, a saint and a visionary. That which disturbs us is not a material effect, nor the fact of the 'imprisonment'; any film could create the same effect. No, it is the music, it is Beethoven himself. It is this 'nostalgia of liberty' he feels, or better, makes us feel; this
Rescue opera to "Fidelio" is Rossini's "Torvaldo e Dorliska" of 1815. Bedřich Smetana's "Dalibor" (1868), which contains no spoken dialogue and which bears marks of Wagnerian influence, has nonetheless been called a rescue opera, in part because of its political themes. Rescue opera was primarily a product of the French Revolution. The social changes of the period meant that opera must now appeal to the masses, and post-aristocratic, patriotic, idealistic themes—such as resistance to oppression, secularism, the political power of individuals and of people working together, and fundamental changes to the status quo—were popular. The Terror influenced stories of fear and imprisonment;