Leo the Great
Feast Day: November 10
Pope whose theology at Chalcedon defined Christ and established papal doctrinal authority.
Patronage
Papal authority, theologians, general intercession
Virtues & Traits
Biography
Leo I (c. 400-461), known as Leo the Great, was Pope during Christianity's most turbulent era. His pontificate (440-461) witnessed the collapse of Roman imperial authority and the rise of barbarian invasions. Despite these crises, Leo established papal theological authority and doctrinal clarity. He authored the Tome of Leo, a foundational christological document affirmed at the Council of Chalcedon (451), which defined Christ's divine and human natures. Historically, Leo famously confronted Attila the Hun in 452, reportedly persuading him to spare Rome. His letters and sermons demonstrate profound theological insight and pastoral concern. Leo's legacy fundamentally shaped papal authority, Catholic Christology, and the Church's institutional stability during the Western Empire's collapse.