Umberto Giordano in the context of "Luigi Illica"

A libretto (from the Italian word libretto, lit. 'booklet') is the text used in, or intended for, an extended musical work such as an opera, operetta, masque, oratorio, cantata or musical. The term libretto is also sometimes used to refer to the story line of a ballet or the texts of major liturgical works, such as the Mass, requiem, or sacred cantata.

The Italian word libretto (pronounced [liˈbretto], plural libretti [liˈbretti]) is the diminutive of the word libro ("book"). Sometimes other-language equivalents are used for libretti in that language, livret for French works, Textbuch for German and libreto for Spanish. A libretto is distinct from a synopsis or scenario of the plot, in that the libretto contains all the words and stage directions, while a synopsis summarizes the plot. Some ballet historians also use the word libretto to refer to the 15- to 40-page books which were on sale to 19th century ballet audiences in Paris and contained a very detailed description of the ballet's story, scene by scene.

Andrea Chénier (Italian pronunciation: [anˈdrɛːa ʃʃeˈnje]) is a verismo opera in four acts by Umberto Giordano, set to an Italian libretto by Luigi Illica, and first performed on 28 March 1896 at La Scala, Milan. The story is based loosely on the life of the French poet André Chénier (1762–1794), who was executed during the French Revolution. The character Carlo Gérard is partly based on Jean-Lambert Tallien, a leading figure in the Revolution. It remains popular with audiences, though less frequently performed than in the first half of the 20th century. One reason for its survival in the repertoire is the lyrical-dramatic music provided by Giordano for the tenor lead, which gives a talented singer opportunities to demonstrate his skills and flaunt his voice. Giuseppe Borgatti's triumph in the title role at the first performance immediately propelled him to the front rank of Italian opera singers. He went on to become Italy's greatest Wagnerian tenor, rather than a verismo-opera specialist.

Victorien Sardou (/sɑːrˈduː/ sar-DOO, French: [viktɔʁjɛ̃ saʁdu]; 5 September 1831 – 8 November 1908) was a French dramatist. He is best remembered today for his development, along with Eugène Scribe, of the well-made play. He also wrote several plays that were made into popular 19th-century operas such as La Tosca (1887) on which Giacomo Puccini's opera Tosca (1900) is based, and Fédora (1882) and Madame Sans-Gêne (1893) that provided the subjects for the lyrical dramas Fedora (1898) and Madame Sans-Gêne (1915) by Umberto Giordano. His play Gismonda, from 1894, was also adapted into an opera of the same name by Henry Février.

Paolo Serrao (11 April 1830 – 17 March 1907) was a distinguished and influential Italian teacher of musical theory and composition at Naples.

Serrao was born in Filadelfia, Calabria. As professor of composition at the San Pietro a Maiella Conservatorio at Naples, over many years, he taught many famous Italian musicians, notably Giuseppe Martucci, Umberto Giordano, Leopoldo Mugnone, Michele Esposito, Francesco Cilea, Franco Alfano, Luigi Denza and Alessandro Longo.

In opera, verismo (Italian for 'realism'), from vero, meaning 'true', was a post-Romantic operatic tradition associated with Italian composers such as Pietro Mascagni, Ruggero Leoncavallo, Umberto Giordano, Francesco Cilea and Giacomo Puccini.

Verismo as an operatic genre had its origins in an Italian literary movement of the same name. This was in turn related to the international literary movement of naturalism as practised by Émile Zola and others. Like naturalism, the verismo literary movement sought to portray the world with greater realism. In so doing, Italian verismo authors such as Giovanni Verga wrote about subject matter, such as the lives of the poor, that had not generally been seen as a fit subject for literature.

André Marie Chénier (French pronunciation: [ɑ̃dʁe maʁi ʃenje]; 30 October 1762 – 25 July 1794) was a French poet associated with the events of the French Revolution, during which he was sentenced to death. His sensual, emotive poetry marks him as one of the precursors of the Romantic movement. His career was brought to an abrupt end when he was guillotined for supposed "crimes against the state". Chénier's life has been the subject of Umberto Giordano's opera Andrea Chénier and other works of art.