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.
Le timbre d'argent Le timbre d'argent ("The Silver Bell") is an opéra fantastique in four acts by composer Camille Saint-Saëns to a French libretto by Jules Barbier and Michel Carré. Although completed in 1865, the opera did not receive its premiere performance until 23 February 1877, when it was presented by Albert Vizentini's Théâtre National Lyrique at the Théâtre de la Gaîté in Paris. It includes the well-known aria "Le bonheur est chose légère."