Which opera has more acts, Riders to the Sea or Lucio Silla?
Lucio Silla Lucio Silla (pronounced , ] ), K. 135, is an Italian opera in three acts composed by Wolfgang Amadeus Mozart. The libretto was written by Giovanni de Gamerra.
I due timidi I due timidi (in English, "The Two Timid Ones") is a one-act radio opera (also described as a "commedia lirica") composed in 1950 by Nino Rota with libretto by the film writer Suso Cecchi d'Amico.