Career

He was Bishop of Langres and was later consecrated as Archbishop of Besançon. Mathieu was elevated to Cardinal on 30 September 1850 by Pope Pius IX and became Cardinal-Priest of San Silvestro in Capite in 1852. He is also the author of "Devoirs Du Sacerdoce ou Traité de la Dignité, de la Perfection, des Obligations.. du Prêtre Catholique".