June 1910 to widespread critical acclaim and Stravinsky became an overnight sensation. As his wife was expecting their third child, the Stravinskys spent the summer in La Baule in western France. In September, they moved to Clarens, Switzerland where their second son, Sviatoslav (Soulima), was born. The family would spend their summers in Russia and winters in Switzerland until 1914. Diaghilev commissioned Stravinsky to score a second ballet for the 1911 Paris season. The result was Petrushka, based the Russian folk tale featuring the titular character, a puppet, who falls in love with another, a ballerina. Though it failed to capture the immediate reception that The Firebird had following its premiere at Théâtre du Châtelet in June 1911, the production continued Stravinsky's success. 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 idea thought up by Stravinsky while composing Firebird, the production features a series of primitive pagan rituals celebrating the advent of spring, after which a young girl is chosen as a sacrificial victim 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. 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 roubles but soon became bankrupt. Diaghilev agreed for the Ballets Russes to stage it. The opera had 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 Ravel, Bartók, and Reynaldo Hahn