

Eugène Scribe was one of the most prolific librettists of the 19th century, providing the words for works by Meyerbeer (with whom he had a lasting collaboration), Auber, Bellini, Donizetti, Rossini and Verdi. He wrote the libretti for three of Mozart's greatest operas, and for many other composers as well. Another noted 18th-century librettist was Lorenzo Da Ponte. His libretti were set many times by many different composers. Pietro Trapassi, known as Metastasio (1698–1782) was one of the most highly regarded librettists in Europe.

Libretti for operas, oratorios and cantatas in the 17th and 18th centuries were generally written by someone other than the composer, often a well-known poet. The composer of Cavalleria rusticana, Pietro Mascagni, flanked by his librettists, Giovanni Targioni-Tozzetti and Guido Menasci In the context of a modern English language musical theatre piece, the libretto is often referred to as the book of the work, though this usage typically excludes sung lyrics. The relationship of the librettist (that is, the writer of a libretto) to the composer in the creation of a musical work has varied over the centuries, as have the sources and the writing techniques employed. 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. 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. Sometimes other-language equivalents are used for libretti in that language, livret for French works, Textbuch for German and libreto for Spanish. Libretto ( pronounced plural libretti ), from Italian, is the diminutive of the word libro ("book"). The term libretto is also sometimes used to refer to the text of major liturgical works, such as the Mass, requiem and sacred cantata, or the story line of a ballet. Cover of a 1921 libretto for Giordano's Andrea ChénierĪ libretto (Italian for "booklet") is the text used in, or intended for, an extended musical work such as an opera, operetta, masque, oratorio, cantata or musical.
