Pope Gregory XVI (18 September 1765 – 1 June 1846), born Bartolomeo Alberto Cappellari, was Pope of the Roman Catholic Church from 1831 to 1846. He had adopted the name Mauro upon entering the religious order of the Camaldolese. Strongly conservative and traditionalist, he opposed democratic and modernising reforms in the Papal States and throughout Europe, seeing them as fronts for revolutionary leftism, and he sought to strengthen the religious and political authority of the papacy (see Ultramontanism).