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.
Sly (opera) Sly, ovvero La leggenda del dormiente risvegliato (English: "Sly, or The Legend of the Sleeper Awoken") is an opera in three acts by Ermanno Wolf-Ferrari to an Italian libretto by Giovacchino Forzano, based on the Induction (the Prologue) to William Shakespeare's "The Taming of the Shrew" (the German version of libretto, "Sly, oder Die Legende vom wiedererweckten Schläfer", was translated by ). Unlike most of Wolf-Ferrari's other operas, this is a tragedy.