Charles Arnold Tournemire (1870-1939) was a French composer and organist, primarily associated with the genres of classical and liturgical music. He is best known for his contributions to organ music and choral compositions. Tournemire served as the organist at the Basilica of Saint-Sulpice in Paris, where he developed a significant reputation. One of his notable works is the "L'Organiste," a collection of organ pieces that showcases his innovative harmonic language and improvisational style. He also composed the "Messe de la Sainte-Croix," which reflects his deep commitment to religious music. Tournemire's impact on music includes his influence on the French symphonic organ style and his role in the revival of liturgical music in the early 20th century. His works are characterized by their rich textures, use of modal harmonies, and intricate counterpoint, contributing to the broader development of French music during that period.