In February 1909, two of Stravinsky's orchestral works, the Scherzo fantastique and Feu d'artifice (Fireworks) were performed at a concert in Saint Petersburg, where they were heard by Serge Diaghilev, who was at that time involved in planning to present Russian opera and ballet in Paris. Diaghilev was sufficiently impressed by Fireworks to commission Stravinsky to carry out some orchestrations and then to compose a full-length ballet score, The Firebird.