ABSTRACT
Eusebius remained at heart a philosopher of the old school who was eager to use the teaching of the ancients to justify the results of the Triumph of the Cross. Eusebius grew up and was educated in the shadow of the teaching and writings of the successors of Origen, whose library he inherited. The Christian Church was foretold by Jesus Christ and became a supreme and universal institution for mankind. To the ancient Greeks the two great monarchies of the world had been Egypt and Persia. Eusebius dedicated two important works to Constantine the Great. The Eusebian notion of Christian kingship remained the fundamental theory of Byzantium for as long as the Emperors reigned at Constantinople up to 1453.
