Lucio Silla, K. 135, is an Italian opera

Opera

Opera is an art form in which singers and musicians perform a dramatic work combining text and musical score, usually in a theatrical setting. Opera incorporates many of the elements of spoken theatre, such as acting, scenery, and costumes and sometimes includes dance...

 in three acts composed by Wolfgang Amadeus Mozart

Wolfgang Amadeus Mozart

Wolfgang Amadeus Mozart , baptismal name Johannes Chrysostomus Wolfgangus Theophilus Mozart , was a prolific and influential composer of the Classical era. He composed over 600 works, many acknowledged as pinnacles of symphonic, concertante, chamber, piano, operatic, and choral music...

. The libretto

Libretto

A libretto is the text used in 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 text of major liturgical works, such as mass, requiem, and sacred cantata, or even the story line of a...

 was written by Giovanni de Gamerra

Giovanni de Gamerra

Giovanni de Gamerra was a cleric, a playwright, and a poet. He is best known as a prolific librettist....

.

It was first performed on 26 December 1772 at the Regio Ducal Teatro in Milan

Milan

Milan is the second-largest city in Italy and the capital city of the region of Lombardy and of the province of Milan. The city proper has a population of about 1.3 million, while its urban area, roughly coinciding with its administrative province and the bordering Province of Monza and Brianza ,...

.

Other operas with the same title were also composed by Pasquale Anfossi

Pasquale Anfossi

Bonifacio Domenico Pasquale Anfossi was an Italian opera composer. Born in Taggia, Liguria, he studied with Niccolò Piccinni and Antonio Sacchini, and worked mainly in London, Venice and Rome....

 (1774), and Johann Christian Bach

Johann Christian Bach

Johann Christian Bach was a composer of the Classical era, the eleventh and youngest son of Johann Sebastian Bach. He is sometimes referred to as 'the London Bach' or 'the English Bach', due to his time spent living in the British capital...

 (1776).

The story concerns the Roman dictator Lucio Silla (Lucius Sulla) who lusts after Giunia, the daughter of his enemy Caius Marius.