Which opera has more acts, Riders to the Sea or Lucio Silla?
Lucio Silla Lucio Silla (pronounced , ] ), K. 135, is an Italian opera in three acts composed by Wolfgang Amadeus Mozart. The libretto was written by Giovanni de Gamerra.
Teseo Teseo ("Theseus", HWV 9; ] ) is an opera seria with music by George Frideric Handel, the only Handel opera that is in five acts. The Italian-language libretto was by Nicola Francesco Haym, after Philippe Quinault's "Thésée". It was Handel's third London opera, intended to follow the success of "Rinaldo" after the unpopular "Il pastor fido".