High Quality Content by WIKIPEDIA articles! Eusebius of Caesarea became the Bishop of Caesarea, in Palestine, about the year 314. He flourished during the time of Constantine the Great and Constantius. His surname Pamphilus came from his relationship with Pamphilus the martyr. Eusebius, historian, exegete and polemicist is one of the more renowned Church Fathers. He (with Pamphilus) was a most diligent investigator of the Canon. Demonstrations of the Gospel, Preparations for the Gospel, and On Discrepancies between the Gospels were among his scholarly works. As "Father of Church History" he produced Ecclesiastical History, On the Life of Pamphilus, Chronicle of Universal History and On the Martyrs.