Life and setting
Leo I strengthened Roman episcopal claims and wrote influential sermons and letters. His Tome to Flavian became a major source in the Christological settlement at Chalcedon in 451.
Late Antiquity • Western / Latin Christianity
Leo the Great
c. 400 – 461 • Bishop of Rome
Why this person matters
He is central to the history of the papacy and to Western reception of Chalcedonian Christology.
What should not be sanitized
Eastern and Western traditions assess the extent of Roman authority in this period differently.