Pope Leo XII

Pope Leo XII (; 22 August 1760 – 10 February 1829), born Annibale Francesco Clemente Melchiore Girolamo Nicola Sermattei della Genga, was an Italian priest of the Roman Catholic Church and the 253rd Pope from 1823 to 1829.
Life.
Della Genga was born in a family of Papal States nobility. 
Priest.
Della Genga was ordained as a priest in 1783. 
Pope Pius VII made him his private secretary. 
Bishop.
In 1793, he was made Archbishop of Tyre; and he was sent as papal nuncio to Lucerne. 
He was the papal nuncio in Cologne between 1794 and 1805.
After 1805, he retired to the abbey of Monticelli near Florence.
Cardinal.
Tn 1816, Pius VII created him cardinal. 
In 1820, Cardinal della Genga became Vicar-General of Rome.
Pope.
Cardinal della Genga was elected pope 1n September 1823.