Which had more acts: Il matrimonio segreto or Pelléas et Mélisande?
Il matrimonio segreto: Il matrimonio segreto ("The Secret Marriage") is an opera in two acts, music by Domenico Cimarosa, on a libretto by Giovanni Bertati, based on the play "The Clandestine Marriage" by George Colman the Elder and David Garrick.
i don't know