Which contained more acts, Macbeth or Les mamelles de Tirésias?
Macbeth (opera) Macbeth (] ) is an opera in four acts by Giuseppe Verdi, with an Italian libretto by Francesco Maria Piave and additions by Andrea Maffei, based on William Shakespeare's play of the same name.
Céphale et Procris (Grétry) Céphale et Procris ("Cephalus and Procris") is an opera by André Grétry with a French-language libretto by Jean-François Marmontel based on the Classical myth of Cephalus and Procris as told in Book Seven of Ovid's "Metamorphoses". It takes the form of a "ballet héroïque" in three acts. It was first performed at the Palace of Versailles on 30 December 1773.