with the internal weaknesses of the empire. He brought the solidarity and moral force of Christianity to revive the spirit of the declining empire, and he decided to create a new permanent capital at Byzantium upon the Hellespont. This new-made Byzantium, which was re-christened Constantinople in his honour, was still building when he died. Towards the end of his reign occurred a remarkable transaction. The Vandals, being pressed by the Goths, asked to be received into the Roman Empire. They were assigned lands in Pannonia, which is now that part of Hungary west of the Danube, and their fighting men became nominally legionaries. But these new legionaries remained under their own chiefs. Rome failed to digest them.
Constantine died working to reorganize his great realm, and soon the frontiers were ruptured again and the Visigoths came almost to Constantinople. They defeated the Emperor Valens at Adrianople and made a settlement in what is now Bulgaria, similar to the settlement of the Vandals in Pannonia. Nominally they were subjects of the emperor, practically they were conquerors.