It was Stravinsky's third ballet for Diaghilev, The Rite of Spring, that caused a sensation among critics, fellow composers, and concertgoers. Based on an original idea offered to Stravinsky by Nicholas Roerich, the production features a series of primitive rituals celebrating the advent of spring, after which a young girl is chosen as a sacrificial victim to the sun god Yarilo, and dances herself to death. Stravinsky's score contained many novel features for its time, including experiments in tonality, metre, rhythm, stress and dissonance. The radical nature of the music and choreography caused a near-riot at its premiere at the Théâtre des Champs-Élysées on 29 May 1913. The "Russian world" became synonymous with the barbarism, and, at that time, it had attracted Europe.
Shortly after the premiere, Stravinsky contracted typhoid from eating bad oysters and he was confined to a Paris nursing home. He left in July 1913 and returned to Ustilug. For the rest of the summer he focused on his first opera, The Nightingale (Le Rossignol), based on the same-titled story by Hans Christian Andersen, which he had started in 1908. On 15 January 1914, Stravinsky and Nosenko had their fourth child, Marie Milène (or Maria Milena). After her delivery, Nosenko was discovered to have tuberculosis and was confined to a sanatorium in Leysin in the Alps. Stravinsky took up residence nearby, where he completed The Nightingale. The work premiered in Paris in May 1914, after the Moscow Free Theatre had commissioned the piece for 10,000 rubles but soon became bankrupt. Diaghilev agreed for the Ballets Russes to stage it. The opera only lukewarm success with the public and the critics, apparently because its delicacy did not meet their expectations following the tumultuous Rite of Spring. However, composers including Maurice Ravel, Béla Bartók, and Reynaldo Hahn found much to admire in the score's craftsmanship, even alleging to detect the influence of Arnold Schoenberg.