Opera in prologue and 3 acts by Rimsky‐Korsakov to his own lib. after play by Mey (1860). Comp. 1868–72. Prod. St Petersburg 1873; Moscow 1898, rev. version 1876–7, 3rd version 1891–2, prod. St Petersburg and Moscow 1896, London 1913. Also known under title Ivan the Terrible, bestowed by Diaghilev, Paris 1909.