Are both pieces The Immortal Hour and L'incoronazione di Poppea an opera?
The Immortal Hour The Immortal Hour is an opera by English composer Rutland Boughton. Boughton adapted his own libretto from the works of Fiona MacLeod, a pseudonym of writer William Sharp.
I due Foscari I due Foscari ("The Two Foscari") is an opera in three acts by Giuseppe Verdi to an Italian libretto by Francesco Maria Piave, based on a historical play, "The Two Foscari" by Lord Byron.