Der goldene Hahn
Marina Frolova-Walker points to "The Golden Cockerel" as the fore-runner of the anti-psychologistic and absurdist ideas which would culminate in such 20th century 'anti-operas' as Prokofiev's "The Love for Three Oranges" (1921) and Shostakovich's "The Nose" (1930). In this, his last opera, Rimsky-Korsakov had laid "the foundation for modernist opera in Russia and beyond."