A French theologian and journalist, born at St. Malo; began life as a free-thinker, but by-and-by became a Roman Catholic of the extreme ultramontane type; in 1820 went to Rome and was offered a cardinalate, but in 1830 his views changed, and he joined Montalembert and Lacordaire in the conduct of L'Avenir, a journal which advocated religious and political freedom, on the condemnation of which by the Pope he became again a free-thinker and revolutionary; his influence on French literature was great, and affected both Michelet and Victor Hugo (1782-1854).