The song the men are singing on the street at the beginning of the movie is from "Abu Hassan", an musical play by Carl Maria von Weber from 1811. The song is from from the act Nr. 3 named "Choir of the creditors". The song that Carl Maria von Weber sang himself in the movie is the follow up as performed in the actual play. The play is later rehearsed and performed in the movie.
The title "Invitation To The Dance" is taken straight out of Carl Maria von Weber's Rondo for a piano solo of the same name from 1819. This piece can be heard in the opening credits.
Two years before this movie Willy Domgraf-Fassbaender starred as Theodor Körner in Theodor Körner (1932). Carl Maria von Weber, whom he is playing in this movie, has put many of Körner's poems to music while being in Prague, which is the main setting in this movie.