Which has more acts, Die Walküre or La fille du régiment?
La fille du régiment La fille du régiment ("The Daughter of the Regiment") is an opéra comique in two acts by Gaetano Donizetti, set to a French libretto by Jules-Henri Vernoy de Saint-Georges and Jean-François Bayard. It was first performed on 11 February 1840 by the Paris Opéra-Comique at the Salle de la Bourse.
Die Abreise Die Abreise ("The Departure") is a comic opera in one act by composer Eugen d'Albert. The libretto was written by Ferdinand Sporck, a friend of the composer, after a play by August Ernst Steigentesch.