Pope Gregory XVI (18 September 1765 – 1 June 1846), born Bartolomeo Alberto Cappellari, named Mauro as a member of the religious order of the Camaldolese, is Pope of the Catholic Church from 1831 to 1846.

Strongly conservative and traditionalist, he opposes democratic and modernizing reforms in the Papal States and throughout Europe, seeing them as fronts for revolutionary leftism, and seeks to strengthen the religious and political authority of the papacy.