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.
Jone (opera) Jone, ossia L'ultimo giorno di Pompei is an opera in four acts by Errico Petrella. The Italian-language libretto was by Giovanni Peruzzini, after Edward Bulwer-Lytton's famous novel "The Last Days of Pompeii".