The Nightingale (opera) completed his other two major ballets for Diaghilev, "Petrushka" and "The Rite of Spring". Because the time between the writing of the first and second acts extended over six years, stylistically the work reflects Stravinsky's significantly changed approach to composition, and this can clearly be detected when performances are given. Stravinsky subsequently turned aside from large productions to concentrate on chamber music and the piano. For the opera's premiere, the singers were in the pit and their roles were mimed and danced on stage. The "mise-en-scène" was by Alexandre Benois (who also designed the sets and costumes) and Alexandre Sanine,
The Rite of Spring of musical language that they could never again be put together as before". The academic and critic Jan Smaczny, echoing Bernstein, calls it one of the 20th century's most influential compositions, providing "endless stimulation for performers and listeners". According to Kelly the 1913 premiere might be considered "the most important single moment in the history of 20th century music", and its repercussions continue to reverberate in the 21st century. Ross has described "The Rite" as a prophetic work, presaging the "second avant-garde" era in classical composition—music of the body rather than of the mind, in which "[m]elodies would follow the