Eusebius (265-340), the earliest of Church historians, was born in Palestine. In 315 he was Bishop of Ceesarea, and from being an opponent of the Arians he ended by siding with them against St. Athanasius. He wrote a history of the Church from the birth of Christ to 324, in Greek. There are several editions and translations of it. Of his Chrnnicon there are fragments, and a translation by St. Jerome. He wrote a Prccparatio Evangelica in 15 books, and a Demonstratio Evangelica in 20 books, of which 10 exist in an imperfect form. He also wrote a notice of the Emperor Constantine. It is a question how- far his history is to be trusted.