Sergey Prokudin-Gorsky
Sergey Mikhaylovich Prokudin-Gorsky (, ;  – September 27, 1944) was a Russian chemist and photographer. He is best known for his pioneering work in colour photography and his effort to document early 20th-century Russia.
Nikolai Rimsky-Korsakov
Rimsky-Korsakov wrote that "May Night" was of great importance because, despite the opera's containing a good deal of contrapuntal music, he nevertheless ""cast off the shackles of counterpoint" [emphasis Rimsky-Korsakov]". He wrote the opera in a folk-like melodic idiom, and scored it in a transparent manner much in the style of Glinka. Nevertheless, despite the ease of writing this opera and the next, "The Snow Maiden", from time to time he suffered from creative paralysis between 1881 and 1888. He kept busy during this time by editing Mussorgsky's works and completing Borodin's "Prince Igor" (Mussorgsky died in 1881, Borodin in 1887).