Which opera has more parts including acts and tableaux, Le roi d'Ys or Stiffelio?
Le roi d'Ys Le roi d'Ys ("The King of Ys") is an opera in three acts and five tableaux by the French composer Édouard Lalo, to a libretto by Édouard Blau, based on the old Breton legend of the drowned city of Ys. That city was, according to the legend, the capital of the kingdom of Cornouaille.
Sly (opera) Sly, ovvero La leggenda del dormiente risvegliato (English: "Sly, or The Legend of the Sleeper Awoken") is an opera in three acts by Ermanno Wolf-Ferrari to an Italian libretto by Giovacchino Forzano, based on the Induction (the Prologue) to William Shakespeare's "The Taming of the Shrew" (the German version of libretto, "Sly, oder Die Legende vom wiedererweckten Schläfer", was translated by ). Unlike most of Wolf-Ferrari's other operas, this is a tragedy.