Composer, born in Paris. She studied at the Conservatoire (1897--1904), where she won several prizes, and went on to write many vocal and instrumental works, winning second prize at the Grand Prix de Rome in 1908 for her cantata, La Sirène (The Siren). After 1918 she devoted herself to teaching, first at home, and later at the Conservatoire and the Ecole Normale de Musique, where she had international influence. She was also a noted organist and conductor. Her sister, (Marie-Juliette Olga) Lili Boulanger (1893--1918), was also a composer.