surnamed Pamphilus, a celebrated bishop of Caesarea in Palestine, and one of the most learned men of his time, was born in Palestine about the latter end of the reign of Gallienus. He was the intimate friend of Pamphilus the Martyr; and, after his death, took his name in honour to his memory. He was ordained bishop of Caesarea in 315. He had a considerable share in the contest relating to Arius; whose cause he, as well as several other bishops of Palestine, defended, being persuaded that Arius had been unjustly persecuted by Alexander bishop of Alexandria. He assisted at the council of Nice in 325; when he made a speech to the emperor Constantine on his coming to the council, and was placed next him on his right hand. He was present at the council of Antioch, in which Eustathius bishop of that city was deposed; but though he was chosen by the bishop and people of Antioch to succeed him, he absolutely refused it. In 335, he assisted at the council of Tyre, held against Athanasius; and at the assembly of bishops at Jerusalem, at the time of the dedication of the church there. By these bishops he was sent to the emperor Constantine to defend what they had done against Athanasius; when he pronounced the panegyric made on that emperor during the public rejoicings in the beginning of the 30th year of his reign, which was the last of his life. Eusebius survived the emperor but a short time, for he died in 338. He wrote, 1. An Ecclesiastical History, of which Valetius has given a good edition in Greek and Latin. 2. The life of Constantine. 3. A treatise against Hierocles. 4. Chronicon. 5. Preparations Evangelicae. 6. De demonstratione Evangelica, of which there are but 10 books extant out of 20; and several other works, some of which are lost.