Olivier Messiaen

Olivier Messiaen (December 10, 1908 – April 27, 1992) was a French composer, organist, and ornithologist. Messiaen's music is rhythmically complex (he was interested in rhythms from ancient Greece and from Hindu sources), and is harmonically and melodically based on modes of limited transposition, which were Messiaen's own innovation. Many of his compositions depict what he termed "the marvellous aspects of the faith", drawing on his unshakeable Roman Catholicism.