La leggenda della città invisibile di Kítesc : opera in quattro atti e sei quadri / di N. Rimski-Korsakov ; libretto di V. Bielski ; versione ritmica dal russo di Rinaldo Küfferle (1933)
Mitrofan Petrovich Belyayev (Russian: Митрофа́н Петро́вич Беля́ев; old style 10/22 February 1836, St. Petersburg – 22 December 1903/ 4 January 1904) was an Imperial Russian music publisher, outstanding philanthropist, and the owner of a large wood dealership enterprise in Russia. He was also the founder of the Belyayev circle, a society of musicians in Russia whose members included Nikolai Rimsky-Korsakov, Alexander Glazunov and Anatoly Lyadov. His surname is often transliterated as Belaieff or Belayev. In 1886 the important Russian painter Ilya Repin made a portrait of Belyayev.