Which opera has more acts, Riders to the Sea or Lucio Silla?
Riders to the Sea (opera) Riders to the Sea is a short one-act opera by Ralph Vaughan Williams, based on the play of the same name by John Millington Synge. The composer completed the score in 1927, but it was not premiered until 1 December 1937, at the Royal College of Music, London. The opera remained largely the province of students and amateurs until it entered the repertoire of Sadler's Wells in 1953.
L'Ipermestra L'Ipermestra is an 18th-century Italian opera in 3 acts by the Czech composer Josef Mysliveček composed to a libretto by the Italian poet Metastasio first produced in 1744. This opera (and all the rest of Mysliveček's operas) belong to the serious type in Italian language referred to as "opera seria".