Origen

What is told here of his life comes from the sixth book of Eusebius, who collected his letters and wrote a defence of him (Eusebius, Church History 6.36.3–4). Origen was not quite seventeen when his father Leonides was beheaded in the persecution under Severus, and in his eighteenth year he took charge of the instruction of converts at Alexandria (Eusebius, Church History 6.1–6.3.3). He learned Hebrew and set the Hebrew Scriptures and the Greek translations side by side in the Hexapla (Eusebius, Church History 6.16).

He was ordained a presbyter by the bishops of Palestine, to the anger of his own bishop Demetrius, and moved to Caesarea Maritima, where pupils came to him from other countries (Eusebius, Church History 6.8.4–5, 6.23.4, 6.26, 6.30). Under Decius he was imprisoned and tortured (Eusebius, Church History 6.39.5). Eusebius says that he died in the reign of Gallus, aged sixty-nine (Eusebius, Church History 7.1).