Fidelio some spoken dialogue, tells how Leonore, disguised as a prison guard named "Fidelio", rescues her husband Florestan from death in a political prison. Bouilly's scenario fits Beethoven's aesthetic and political outlook: a story of personal sacrifice, heroism, and eventual triumph. With its underlying struggle for liberty and justice mirroring contemporary political movements in Europe, such topics are typical of Beethoven's "middle period". Notable moments in the opera include the "Prisoners' Chorus" ("O welche Lust"—"O what a joy"), an ode to freedom sung by a chorus of political prisoners, Florestan's vision of Leonore come as an angel to rescue him, and
Italian opera composers of the next generation: Francesco Cavalli and Antonio Cesti. In Polish–Lithuanian Commonwealth a tradition of operatic production began in Warsaw in 1628, with a performance of "Galatea" (composer uncertain), the first Italian opera produced outside Italy. Shortly after this performance, the court produced Francesca Caccini's opera "La liberazione di Ruggiero dall'isola d’Alcina", which she had written for Prince Władysław Vasa three years earlier when he was in Italy. Another first, this is the earliest surviving opera written by a woman. "Gli amori di Aci e Galatea" by Santi Orlandi was also performed in 1628. When Władysław was king (as