Peter Grimes, Op. 33, is an opera in three acts by Benjamin Britten, with a libretto by Montagu Slater based on the section "Peter Grimes", in George Crabbe's long narrative poem The Borough. The "borough" of the opera is a fictional small town that bears some resemblance to Crabbe's – and later Britten's – home of Aldeburgh, Suffolk, on England's east coast. The work was conceived while Britten was living in the US in the early years of the Second World War and completed when he returned to Britain in 1943.
https://en.wikipedia.org/wiki/Peter_Grimes