St. Leo the Great

c. 400–461 ADNicene1 work on Theoria

Pope and Doctor of the Church, defender of Chalcedonian orthodoxy through his Tome

Works available to read

Lettersc. 440–461 ADThe papal letters of Leo the Great, including the landmark Tome of Leo (Ep. XXVIII) on the two natures of Christ, which shaped the Definition of Chalcedon.

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