Juliette Nadia Boulanger (French: [ʒy.ljɛt na.dja bu.lɑ̃.ʒe]; 16 September 1887 – 22 October 1979) was a French composer, conductor, and teacher. She is notable for having taught many of the leading composers and musicians of the 20th century. She also performed occasionally as a pianist and organist. Boulanger was the first woman to conduct many major orchestras in America and Europe, including the BBC Symphony, Boston Symphony, Hallé, New York Philharmonic and Philadelphia orchestras. She conducted several world premieres, including works by Copland and Stravinsky.