Which opera Ernani and Stiffelio.has more acts ?
Ernani Ernani is an operatic "dramma lirico" in four acts by Giuseppe Verdi to an Italian libretto by Francesco Maria Piave, based on the play "Hernani" by Victor Hugo.
I Lituani I Lituani (in English, "The Lithuanians") is an opera consisting of a prologue and three acts by Amilcare Ponchielli to an Italian libretto by Antonio Ghislanzoni, based on the historical poem "Konrad Wallenrod" written by Polish poet Adam Mickiewicz. It premiered at La Scala in Milan on 7 March 1874.