Pope Leo XII's papacy was characterized by his conservative stance and efforts to preserve papal authority against liberal movements in Europe. He is also known for his support of the Catholic Church’s presence in the Americas. Birth name: Annibale Francesco Clemente Melchiorre Girolamo Nicola della Genga Nationality: Papal States Born: August 2, 1760 Died: February 10, 1829 Pontificate: September 28, 1823 – February 10, 1829