Are both pieces The Immortal Hour and L'incoronazione di Poppea an opera?
L'incoronazione di Poppea L'incoronazione di Poppea (SV 308, "The Coronation of Poppaea") is an Italian opera by Claudio Monteverdi, with a libretto by Giovanni Francesco Busenello, first performed at the Teatro Santi Giovanni e Paolo in Venice during the 1643 carnival season. One of the first operas to use historical events and people, it describes how Poppaea, mistress of the Roman emperor Nero, is able to achieve her ambition and be crowned empress. The opera was revived in Naples in 1651, but was then neglected until the rediscovery of the score in 1888, after which it became the subject of scholarly attention in the late 19th and early 20th centuries. Since the 1960s, the opera has been performed and recorded many times.
Gloria (opera) Gloria is a tragic opera in three acts by Francesco Cilea with an Italian libretto by Arturo Colautti. A variation on the Romeo and Juliet story and set in 14th century Siena, the libretto is based on Victorien Sardou's 1874 play "La Haine" ("Hatred"). The opera premiered on 15 April 1907 at La Scala conducted by Arturo Toscanini with Salomea Krusceniski in the title role. "Gloria" was a failure at its premiere when it was withdrawn after two performances and fared little better in the 1932 revised version, although there have been two late 20th century revivals. It proved to be Cilea's last staged opera. In the 43 years following the premiere of "Gloria" he worked on two or three further operas which were never performed and continued to compose chamber and orchestral music.