Preobrazhensky Regiment
Mussorgsky's original vocal score remained unfinished. The final portion of the libretto must be reconstructed from Mussorgsky's themes. The Rimsky-Korsakov edition (1883) adds to the final hymn figures representing flames, trumpet fanfares, and a final reprise of the "March of the Preobrazhensky Regiment" that concludes act 4. The Stravinsky version of the finale (1913) follows Mussorgsky's notes more closely in that the ending fades away. The Shostakovich version attempts to provide a musical conclusion of the opera by bringing back the theme of the sunrise from the Prelude to the opera.