Are both A Midsummer Night's Dream and La sonnambula operas?
La sonnambula La sonnambula ("The Sleepwalker") is an opera semiseria in two acts, with music in the "bel canto" tradition by Vincenzo Bellini set to an Italian libretto by Felice Romani, based on a scenario for a "ballet-pantomime" written by Eugène Scribe and choreographed by Jean-Pierre Aumer called "La somnambule, ou L'arrivée d'un nouveau seigneur". The ballet had premiered in Paris in September 1827 at the height of a fashion for stage works incorporating somnambulism.
Veneen luominen Veneen luominen ("The Building of the Boat") is an unfinished composition by Jean Sibelius. The work was intended to be a grand opera, in the style of Richard Wagner's "Der Ring des Nibelungen", but was never completed, as Sibelius became disenchanted with Wagner's compositional techniques.