Nicene and Post-Nicene Fathers, Ser. II, Vol I:
The Life of Constantine with Orations of Constantine and Eusebius.: Chapter V

Chapter V.—That he reigned above Thirty Years, and lived above Sixty.

With respect to the duration of his reign, God honored him with three complete periods of ten years, and something more, extending the whole term of his mortal life to twice this number of years. 3062 And being pleased to make him a representative of his own sovereign power, he displayed him as the conqueror of the whole race of tyrants, and the destroyer of those God-defying giants 3063 of the earth who madly raised p. 483 their impious arms against him, the supreme King of all. They appeared, so to speak, for an instant, and then disappeared: while the one and only true God, when he had enabled his servant, clad in heavenly panoply, to stand singly against many foes, and by his means had relieved mankind from the multitude of the ungodly, constituted him a teacher of his worship to all nations, to testify with a loud voice in the hearing of all that he acknowledged the true God, and turned with abhorrence from the error of them that are no gods.

Footnotes

Compare discussion of length of reign and life under Life in Prolegomena, p. 411.

̓́Γιγ€ντων. The persecuting emperors appear to be meant, of whom there is more mention hereafter.—Bag.] Refers of course to the mythical Gigantes who fought against the gods. It is used in the same sense in which Æschylus uses it of Capaneus (Theb. 424), who defied Zeus in declaring that even his thunderbolts should not keep him out of Thebes.