New Collected Works of Dmitri Shostakovich. Vol. 52a & 52b. Lady Macbeth of the Mtsensk District. Opera in four acts and nine scenes. Op. 29. Full Score

Lady Macbeth of Mtsensk, Op. 29 (Russian: Ledi Makbet Mcenskogo uezda, romanized: Ledi Makbet Mtsenskogo uyezda, lit. 'Lady Macbeth of the Mtsensk District') is an opera in four acts and nine scenes by Dmitri Shostakovich. The libretto, jointly written by Alexander Preys and the composer, is based on the novella Lady Macbeth of the Mtsensk District by Nikolai Leskov.

Dedicated by Shostakovich to his first wife, physicist Nina Varzar, the roughly 160-minute opera was first performed on 22 January 1934 at the Leningrad Maly Operny, and two days later in Moscow. It incorporates elements of expressionism and verismo, telling the story of a lonely woman in 19th-century Russia who falls in love with one of her husband's workers and is driven to murder.