Eusebius of Caesarea (; ,
Eusébios; 260/265 – 339/340), also known as
Eusebius Pamphili, was a Roman historian,
exegete, and
Christian polemicist of
Greek descent. He became the
bishop of
Caesarea Maritima about 314. Together with
Pamphilus, he was a scholar of the
Biblical canon and is regarded as an extremely well learned Christian of his time. He wrote
Demonstrations of the Gospel,
Preparations for the Gospel, and
On Discrepancies between the Gospels, studies of the Biblical text. As "Father of
Church History" he produced the
Ecclesiastical History,
On the Life of Pamphilus, the
Chronicle and
On the Martyrs.