Boris Godunov (Russian: Борис Годунов, Borís Godunóv) is an opera by Modest Mussorgsky (1839–1881). The work was composed between 1868 and 1873 in Saint Petersburg, Russia. It is Mussorgsky's only completed opera and is considered his masterpiece. Its subjects are the Russian ruler Boris Godunov, who reigned as Tsar (1598 to 1605) during the Time of Troubles, and his nemesis, the False Dmitriy (reigned 1605 to 1606). The Russian-language libretto was written by the composer, and is based on the drama Boris Godunov by Aleksandr Pushkin, and, in the Revised Version of 1872, on Nikolay Karamzin's History of the Russian State.

Librettist Modest Mussorgsky (Bsed on the drama "Boris Godunov" by Aleksandr Pushkin)
Date of composition 1869 (October 1868- December 1869. Revised in 1872)
Premiered 1874, January 27th (Mariinsky Theatre) in Saint Petersburg, Russia
Type Opera
Spoken language Russian
Instruments Voice (Baritone) - Boris Godunov
Voice (Mezzo-Soprano) - Fyodor (or Feodor), Boris's son
Voice (Soprano) - Kseniya (or Xenia), Boris's daughter
Voice (Contralto) - Kseniya's nurse
Voice (Tenor) - Prince Vasiliy Ivanovich Shuysky
Voice (Baritone) - Andrey Shchelkalov, Clerk of the Duma
Voice (Bass) - Pimen, chronicler-hermit
Voice (Tenor) - The Pretender under the name Grigoriy (in training with Pimen)
Voice (Mezzo-Soprano) - Marina Mniszech*, the daughter of the Sandomierz Voyevoda
Voice (Bass) - Rangoni,* a covert Jesuit
Voice (Bass) - Varlaam, a vagabond
Voice (Tenor) - Misail, a vagabond
Voice (Mezzo-Soprano) - The Innkeeper
Voice (Tenor) - The yuródivïy
Voice (Bass) - Nikitich, a police officer
Voice (Bass) - Mityukha, a peasant
Voice (Tenor) - The Boyar-in-Attendance
Voice (Tenor) - The Boyar Khrushchov
Voice (Bass) - Lawicki (or Lavitsky), Jesuit
Voice (Bass) - Czernikowski (or Chernikovsky), Jesuit
Chorus/Choir - Mixed Chorus ; Boyars, the Boyars' children, streltsï, bodyguards, policemen, Polish nobles*, Sandomierz maidens, wandering minstrels, people of Moscow
Orchestra
Arrangements Dmitri Shostakovitch: Orchestration of the Opera 'Boris Godunov' by Mussorgsky, Op. 58
Autotranslations beta Modeste Moussorgski: Boris Godunov
Modest Petrovič Musorgskij: Boris Godunov
Modest Petrowitsch Mussorgski: Boris Godunov