20th Century, 1908-1992: When he heard harmony, he saw color. Olivier Messiaen was not just a visionary composer; he was an organist, an ornithologist and a professor of world-wide acclaim. He was influenced by Ancient Greek theory, Hindu and Japanese culture, his own Roman Catholic faith and the songs of his feathered friends. His music stands as a pillar of the avant-garde in the 20th century.