Paradise Lost is an opera in two acts with music by Krzysztof Penderecki and an English libretto by Christopher Fry.

Penderecki himself characterized the work as a Sacra Rappresentazione (sacred representation) rather than an opera.

The first performance took place on 29 November 1978, at the Lyric Opera of Chicago.

[2] The same production was presented at La Scala, Milan, on 31 January 1979.

[3][4][5] The opera is set in heaven, hell, and on earth at the dawn of creation, and is divided into 42 scenes.