Jacques Offenbach in the context of "Paris Conservatoire"

Musical theatre is a form of theatrical performance that combines songs, spoken dialogue, acting and dance. The story and emotional content of a musical – humor, pathos, love, anger – are communicated through words, music, movement and technical aspects of the entertainment as an integrated whole. Although musical theatre overlaps with other theatrical forms like opera and dance, it may be distinguished by the equal importance given to the music as compared with the dialogue, movement and other elements. Since the early 20th century, musical theatre stage works have generally been called, simply, musicals.

Although music has been a part of dramatic presentations since ancient times, modern Western musical theatre emerged during the 19th century, with many structural elements established by the light opera works of Jacques Offenbach in France, Gilbert and Sullivan in Britain and the works of Harrigan and Hart in America. These were followed by Edwardian musical comedies, which emerged in Britain, and the musical theatre works of American creators like George M. Cohan at the turn of the 20th century. The Princess Theatre musicals (1915–1918) were artistic steps forward beyond the revues and other frothy entertainments of the early 20th century and led to such groundbreaking works as Show Boat (1927), Of Thee I Sing (1931) and Oklahoma! (1943). Some of the best-known musicals through the decades that followed includeMy Fair Lady (1956), The Fantasticks (1960), Hair (1967), A Chorus Line (1975), Les Misérables (1985), The Phantom of the Opera (1986), Rent (1996), Wicked (2003) and Hamilton (2015).

Comic opera, sometimes known as light opera, is a sung dramatic work of a light or comic nature, usually with a happy ending and often including spoken dialogue.

Forms of comic opera first developed in late 17th-century Italy. By the 1730s, a new operatic genre, opera buffa, emerged as an alternative to opera seria. It quickly made its way to France, where it became opéra comique, and eventually, in the following century, French operetta, with Jacques Offenbach as its most accomplished practitioner.

Operetta is a form of theatre and a genre of light opera. It includes spoken dialogue, songs and including dances. It is lighter than opera in terms of its music, orchestral size, and length of the work. Apart from its shorter length, the operetta is usually of a light and amusing character. The subject matter may portray "lovers' spats, mistaken identities, sudden reversals of fortune, and glittering parties". It sometimes also includes satirical commentaries.

"Operetta" is the Italian diminutive of "opera" and was used originally to describe a shorter, perhaps less ambitious work than an opera. Operetta provides an alternative to operatic performances in an accessible form targeting a different audience. Operetta became a recognizable form in the mid-19th century in France, and its popularity led to the development of many national styles of operetta. Distinctive styles emerged across countries including Austria-Hungary, Germany, England, Spain, the Philippines, Mexico, Cuba, and the United States. Through the transfer of operetta among different countries, cultural cosmopolitanism emerged in the previous century. Operetta as a genre lost favor in the 1930s and gave way to modern musical theatre. Important operetta composers include Johann Strauss, Jacques Offenbach, Franz Lehár, and Francisco Alonso.

Robert the Devil, or The Nun, the Dun, and the Son of a Gun is an operatic parody by W. S. Gilbert of Giacomo Meyerbeer's grand opera Robert le diable, which was named after, but bears little resemblance to, the medieval French legend of the same name. Gilbert set new lyrics to tunes by Meyerbeer, Bellini, Offenbach and others.

The piece premiered at the opening of the newly rebuilt Gaiety Theatre in London on 21 December 1868. An extravaganza played on a very large scale, it ran for over 120 performances and played continuously in the British provinces for three years thereafter. It also enjoyed several revivals. The original production starred Nellie Farren in the title role – she became the company's leading "principal boy". Several of the other male roles were played by women, as was common in burlesques of the day.

Ernst Theodor Amadeus Hoffmann (born Ernst Theodor Wilhelm Hoffmann; 24 January 1776 – 25 June 1822) was a German Romantic author of fantasy and gothic horror, a jurist, composer, music critic and artist. He is the author of the novella The Nutcracker and the Mouse King, on which Pyotr Ilyich Tchaikovsky's ballet The Nutcracker is based. In addition, his stories form the basis of Jacques Offenbach's opera The Tales of Hoffmann, in which Hoffmann appears (heavily fictionalized) as the hero. The ballet Coppélia is based on two other stories that Hoffmann wrote, while Schumann's Kreisleriana is based on Hoffmann's character Johannes Kreisler.

Hoffmann's stories highly influenced 19th-century literature, and he is one of the major authors of the Romantic movement.

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.

Eugène Marin Labiche (French pronunciation: [øʒɛn maʁɛ̃ labiʃ]; 6 May 1815 – 22 January 1888) was a French dramatist. He remains famous for his contribution to the vaudeville genre and his passionate and domestic pochades.

In the 1860s, he reached his peak with a series of successes including Le Voyage de M. Perrichon (1860), La Poudre aux yeux (1861), La Station Champbaudet (1862) and La Cagnotte (1864). He worked with Jacques Offenbach, then director of the Bouffes-Parisiens, to write librettos for operettas and for several comic operas.

Henri Meilhac (French pronunciation: [ɑ̃ʁi mɛjak]; 23 February 1830 – 6 July 1897) was a prolific French playwright and opera librettist, known for his collaborations with Ludovic Halévy on comic operas with music by Jacques Offenbach. He also wrote occasionally for serious works including Georges Bizet's Carmen (with Halévy) and Jules Massenet's Manon.

Born in Paris, Meilhac began writing for a humorous magazine in 1852, and four years later he began a career as a playwright. In 1860 he collaborated for the first time with Halévy, an old schoolfriend, on a one-act comedy, presented at the Théâtre des Variétés. Over the next twenty-one years the two co-wrote fifty more stage works.