Original: Peter Grimes is an opera by Benjamin Britten, with a libretto adapted by Montagu Slater from the Peter Grimes section of George Crabbe's poem The Borough.
Simplified: The conductor Sergei Koussevitzky asked Britten to write an opera based on a poem by George Crabbe. The poem, called â The Boroughâ, was about the story of Peter Grimes.