Pope Leo XIII was head of the Catholic Church from 1878 until his death in 1903. He had the fourth-longest reign and third-longest verified reign of any pope, behind those of St. Peter, Pius IX, and John Paul II.
- Occupation
- Latin Catholic priest, Monsignor, nuncio, archbishop
- Position held
- Pope, apostolic nuncio to Belgium, cardinal, Chamberlain of the Apostolic Chamber
- Citizenship
- Papal States, Kingdom of Italy
- Born
- March 2, 1810
- Died
- July 20, 1903
