Fidelio an der Wien. Beethoven was to set a new libretto by Schikaneder, entitled "Vestas Feuer"; however, this libretto was not to Beethoven's liking. He spent about a month composing music for it, then abandoned it when the libretto for "Fidelio" came to his attention. The time Beethoven spent on "Vestas Feuer" was not entirely wasted, as two important numbers from "Fidelio", Pizarro's "'Ha! Welch’ ein Augenblick!" and the duet "O namenlose Freude" for Leonora and Florestan, both originated as music for "Vestas Feuer". Beethoven remained as a resident of the Theater an der Wien for some time after he had
Unity is Strength the Second Sino-Japanese War. Unity is Strength was jointly written in June 1943 by Mu Hong, also the composer of I Love the Eighth Route Army and a major contributor to the production of the Yellow River Cantata, and Lu Su, another well known Chinese communist musician. Allegedly, the song was written in only three days after the lukewarm reception of an opera they had produced under the same name. After facing criticism that the opera ended too abruptly, the two wrote Unity is Strength as a finale act. The piece was written in a small mountain village in Shaanxi