was born in the last part of the reign of Gallienus; for, in his Ecclesiastic History, he informs us, that Dionysius, bishop of Alexandria, lived in his own age.[1] Eusebius, therefore, since Dionysius died in the twelfth year of the reign of Gallienus, must have been born before, if he lived within the time of that prelate. The same inference, also, follows, from his stating,[2] that Paul of Samosata, had revived the heresy of Artemon, in his[3] age. Aid in his history of the occurrences during the reign of Gallienus, before he begins the narrative of the error and condemnation of Paul of Samosata, he observes, "but now, after the history of these things, we will transmit to posterity an account of our own age."
Whom he had for his parents is uncertain; neither do we know by what authorities, Nicephorus Callistus is warranted in affirming, that his mother was the sister of Pamphilus the martyr. Eusebius of Cæsarea, in Arius's letter,[4] is termed brother to Eusebius of Nicomedia. Though he possibly might, on account of his friendship, have received this appellation, yet it is more probable that he was nearly related to the Nicomedian bishop; especially since, Eusebius of Cæsarea only, though many others there are mentioned, is termed by Arius, brother to that prelate. Besides the Nicomedian Eusebius was a native of Syria, and bishop first of Berytus: nor was it then the usage, that foreigners and persons unknown, should be promoted to the government of churches.
Neither is it known what teachers he had in secular learning; but in sacred literature, he had for his preceptor Dorotheus, the eunuch, presbyter of the Antiochian church, of whom he makes honourable mention, in his Seventh Book.[5] Notwithstanding Eusebius there says only, that he had heard Dorotheus expounding the Holy Scriptures with propriety, in the Antiochian church, we are not inclined to object to any one hence inferring, with Trithemius, that Eusebius was Dorotheus's disciple. Theotecnus being at that time dead, the bishopric of the church of Cæsarea was administered by Agapius, a person of eminent piety and great liberality to the poor. By him Eusebius was admitted into the clerical office, and with Pamphilus, a presbyter of distinction at that time in the Cæsarean church, he
