Which opera had more acts,  Il trovatore or Attila?
Il trovatore Il trovatore (] ; Italian for "The Troubadour") is an opera in four acts by Giuseppe Verdi to an Italian libretto largely written by Salvadore Cammarano, based on the play "El trovador" (1836) by Antonio García Gutiérrez. It was Gutiérrez's most successful play, one which Verdi scholar Julian Budden describes as "a high flown, sprawling melodrama flamboyantly defiant of the Aristotelian unities, packed with all manner of fantastic and bizarre incident."
Parisina (Mascagni) Parisina is a "tragedia lirica", or opera, in four acts by Pietro Mascagni. Gabriele D'Annunzio wrote the Italian libretto after Byron's poem "Parisina" of 1816.