Sisters Nadia and Lili Boulanger were the children of a highly musical family. An acclaimed pianist and organist, as well as one of the first professional female conductors, Nadia became even more famous as a teacher of composition. Though a composer herself, she devoted much of her energy to promoting the music of her younger sister Lili, who was the first woman to win the Paris Conservatoire’s Prix de Rome in composition and died at age 24. (Lili dictated Pie Jesu, her last work, to Nadia.)