François-Clément Théodore Dubois (24 August 1837 – 11 June 1924) was a French composer, organist, and music teacher.Théodore Dubois was born in Rosnay in Marne. He studied first under Louis Fanart (the choirmaster at Reims Cathedral) and later at the Paris Conservatoire under Ambroise Thomas. He won the Prix de Rome in 1861. In 1868, he became choirmaster at the Church of the Madeleine, and in 1871 took over from César Franck as choirmaster at the Basilica of Sainte-Clotilde.