Eusebius

Eusebius of Caesarea ; , ''Eusébios tês Kaisareías''}} (30 May AD 339), also known as Eusebius Pamphilius,}} was a Greek Syro-Palestinian historian of Christianity, exegete, and Christian polemicist. In about AD 314 he became the bishop of Caesarea Maritima in the Roman province of Syria Palaestina.

Together with Pamphilus, Eusebius was a scholar of the biblical canon and is regarded as one of the most learned Christians during late antiquity. He wrote the ''Demonstrations of the Gospel'', ''Preparations for the Gospel'' and ''On Discrepancies between the Gospels'', studies of the biblical text. His work ''Onomasticon'' is an early geographical lexicon of places in the Holy Land mentioned in the Bible. As "Father of Church History" BENEDICT XVI |access-date=2021-06-01 |website=www.vatican.va}}}} (not to be confused with the title of Church Father), he produced the ''Ecclesiastical History'', ''On the Life of Pamphilus'', the ''Chronicle'' and ''On the Martyrs''. He also produced a biographical work on Constantine the Great, the first Christian Roman emperor, who was ''Augustus'' between AD 306 and AD 337. Provided by Wikipedia