Eusebius of Caesarea (/juːˈsiːbiəs/; Greek: Εὐσέβιος, Eusébios; AD 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.