Daniel Auber in the context of "L'elisir d'amore"

A number opera (Italian: opera a numeri; German: Nummeroper; French: opéra à numéros) is an opera consisting of individual pieces of music ('numbers') which can be easily extracted from the larger work. They may be numbered consecutively in the score, and may be interspersed with recitative or spoken dialogue. Opera numbers may be arias, but also ensemble pieces, such as duets, trios, quartets, quintets, sextets or choruses. They may also be ballets and instrumental pieces, such as marches, sinfonias, or intermezzi. The number opera format was standard until the mid-19th century and most opera genres, including opera seria, opera buffa, opéra comique, ballad opera, Singspiel, and grand opera, were constructed in this fashion.

The replacement of numbers with more continuous music began in operas by Jommelli, Traetta, Gluck, and especially Mozart, whose late operas Le Nozze di Figaro and Don Giovanni contain several segments in which different numbers are unified by bridge passages to form a musical whole. This trend became even more striking in the operas of the German composers Beethoven, Weber, and Meyerbeer, while their Italian and French contemporaries Rossini, Donizetti, Bellini, and Auber retained the number opera style.

French opera is both the art of opera in France and opera in the French language. It is one of Europe's most important operatic traditions, containing works by composers of the stature of Rameau, Berlioz, Gounod, Bizet, Massenet, Debussy, Ravel, Poulenc and Messiaen. Many foreign-born composers have played a part in the French tradition, including Lully, Gluck, Salieri, Cherubini, Spontini, Meyerbeer, Rossini, Donizetti, Verdi and Offenbach.

French opera began at the court of Louis XIV with Jean-Baptiste Lully's Cadmus et Hermione (1673), although there had been various experiments with the form before that, most notably Pomone by Robert Cambert. Lully and his librettist Quinault created tragédie en musique, a form in which dance music and choral writing were particularly prominent. Lully's most important successor was Rameau. After Rameau's death, Christoph Willibald Gluck was persuaded to produce six operas for the Paris Opera in the 1770s. They show the influence of Rameau, but simplified and with greater focus on the drama. At the same time, by the middle of the 18th century another genre was gaining popularity in France: opéra comique, in which arias alternated with spoken dialogue. By the 1820s, Gluckian influence in France had given way to a taste for the operas of Rossini. Rossini's Guillaume Tell helped found the new genre of Grand opera, a form whose most famous exponent was Giacomo Meyerbeer. Lighter opéra comique also enjoyed tremendous success in the hands of Boieldieu, Auber, Hérold and Adam. In this climate, the operas of Hector Berlioz struggled to gain a hearing. Berlioz's epic masterpiece Les Troyens, the culmination of the Gluckian tradition, was not given a full performance for almost a hundred years after it was written.

Un ballo in maschera ('A Masked Ball') is an 1859 opera in three acts by Giuseppe Verdi. The text, by Antonio Somma, was based on Eugène Scribe's libretto for Daniel Auber's 1833 five act opera, Gustave III, ou Le bal masqué.

The plot concerns the assassination in 1792 of King Gustav III of Sweden who was shot, as the result of a political conspiracy, while attending a masked ball, dying of his wounds thirteen days later.

Le domino noir (The Black Domino) is an opéra comique by the French composer Daniel Auber, first performed on 2 December 1837 by the Opéra-Comique at the Salle de la Bourse in Paris. The libretto to the three-act piece is by Auber's usual collaborator, Eugène Scribe. It was one of Auber's most successful works, clocking up 1,207 performances by 1909. It received its UK premiere in 1838 and appeared in the USA the following year. Some of Auber's music has a Spanish flavour to reflect its setting.

In 1869, Pyotr Ilyich Tchaikovsky provided recitatives to replace the spoken dialogue for a proposed production of Le domino noir by an Italian opera company visiting Russia. No performances are believed to have taken place, but four of Tchaikovsky's recitatives were included in Richard Bonynge's recording of the opera.

Manon (French pronunciation: [manɔ̃]) is an opéra comique in five acts by Jules Massenet to a French libretto by Henri Meilhac and Philippe Gille, based on the 1731 novel L'histoire du chevalier des Grieux et de Manon Lescaut by the Abbé Prévost. It was first performed at the Opéra-Comique in Paris on 19 January 1884, with sets designed by Eugène Carpezat (act 1), Auguste Alfred Rubé and Philippe Chaperon (acts 2 and 3), and Jean-Baptiste Lavastre (act 4).

Prior to Massenet's work, Halévy (Manon Lescaut, ballet, 1830) and Auber (Manon Lescaut, opéra comique, 1856) had used the subject for musical stage works. Massenet also wrote a one-act sequel to Manon, Le portrait de Manon (1894), involving the Chevalier des Grieux as an older man.

La muette de Portici (The Mute Girl of Portici, or The Dumb Girl of Portici), also called Masaniello (Italian pronunciation: [mazaˈnjɛllo]) in some versions, is an opera in five acts by Daniel Auber, with a libretto by Germain Delavigne, revised by Eugène Scribe.

The work has an important place in music history as the earliest French grand opera. It is also known for its alleged role in the Belgian Revolution of 1830.