Which opera has more parts including acts and tableaux, Le roi d'Ys or Stiffelio?
Stiffelio Stiffelio is an opera in three acts by Giuseppe Verdi, from an Italian libretto by Francesco Maria Piave. The origin of this was the novel “Le pasteur d’hommes”, by Émile Souvestre, which was published in 1838. This was adapted into the French play "Le pasteur, ou L'évangile et le foyer" by Émile Souvestre and Eugène Bourgeois. That was in turn translated into Italian by Gaetano Vestri as "Stifellius"; this formed the basis of Piave's libretto.
Daphnis et Alcimadure Daphnis et Alcimadure (in Occitan classical norm, Dafnís e Alcimadura, or according to the original libretto spelling, Daphnis e Alcimaduro) is an opera by the Baroque violinist, conductor and composer Jean-Joseph Cassanéa de Mondonville to a libretto in the Occitan language, written by the composer himself and loosely inspired by La Fontaine's fable bearing the same title. It takes the form of a pastorale in three acts and was later endowed with a prologue in French entitled "Les jeux floraux", to a libretto by Claude-Henri de Fusée de Voisenon.