Boris Godunov - Opera Sung in Russian. From the Teatro Regio di Torino. Rating N/R - Modest Mussorgsky’s Boris Godunov is considered the most important Russian opera ever written. Mussorgsky rejected Western conventions in classical music, instead forging a uniquely Russian style that gives Boris Godunov its arresting and unforgettable. Running Time 200 minutes Genre Opera Release Date Sun 29 Jul