Title: S. Athanasii Archiep. Alex. Syntagma doctrinae ad clericos et laicos ; Valentiniani et Marciani, Impp. Epistolae duae ad Leonem M. ; Theodori Abucarae Tractatus de Unione et Incarnatione
Subjects: History of doctrines, Popes, Primacy, Council of Chalcedon (451)
People: Leo I Pope (-461), Jesus Christ
Time periods: Early church, approximately 30-600