Pope Leo I

Pope Leo I (c. 400 – 10 November 461), also known as Leo the Great,[1] was bishop of Rome[2] from 29 September 440 until his death. Pope Benedict XVI said that Leo's papacy "was undoubtedly one of the most important in the Church's history."[3]

Pope Saint

Leo I
Bishop of Rome
Saint Leo Magnus (17th century) by Francisco Herrera the Younger, in the Prado Museum, Madrid
ChurchCatholic Church
SeeHoly See
Papacy began29 September 440
Papacy ended10 November 461
PredecessorSixtus III
Personal details
Birth nameLeo
Bornc. 400 AD
Tuscany, Western Roman Empire
Died(461-11-10)10 November 461 (aged 60  61)
Rome, Western Roman Empire
Feast day
  • 10 November
  • 11 April (pre-1969 calendar)
  • 18 February (Eastern Orthodoxy)
Venerated in
Theological work
Tradition or movementChalcedonism
Main interestsChristology
Notable ideasChalcedonian Definition
Other popes named Leo
Leo the Great
Confessor, Doctor of the Church, Teacher of the Faith, Holy Hierarch, Bishop of Rome, Roman Pope
Honored inCatholic Church
Eastern Orthodox Church
Anglican Communion
Major shrineSaint Peter's basilica
Feast10 November
3 (or 2) March

He was a Roman aristocrat, and was the first pope to have been called "the Great". He is perhaps best known for having met Attila the Hun in 452 and persuaded him to turn back from his invasion of Italy. He is also a Doctor of the Church, most remembered theologically for issuing the Tome of Leo, a document which was a major foundation to the debates of the Council of Chalcedon, the fourth ecumenical council. That meeting dealt primarily with Christology and elucidated the orthodox definition of Christ's being as the hypostatic union of two natures, divine and human, united in one person, "with neither confusion nor division". It was followed by a major schism associated with Monophysitism, Miaphysitism and Dyophysitism.[4]