César-Auguste-Jean-Guillaume-Hubert Franck (December 10, 1822 – November 8, 1890), a composer, organist and music teacher of Belgian origin, was one of the great figures in classical music in France (and the world) in the second half of the 19th century.
César Antonovich Cui (Russian: Цезарь Антонович Кюи, Cezar' Antonovič Kjui) (January 6, 1835 (Old Style)-March 13, 1918) was a Russian of French and Lithuanian descent. His profession was as an army officer and a teacher of fortifications; his avocational life has particular significance in the history of music, in that he was a composer and music critic; in this sideline he is known as a member of The Five, the group of Russian composers under the leadership of Mily Balakirev dedicated to the production of a specifically Russian brand of music.