It is true that in the far east, Constantinople continued to be the centre of an Empire for another thousand years. But it hardly counted as a part of the European continent. Its interests lay in the east. It began to forget its western origin. Gradually the Roman language was given up for the Greek. The Roman alphabet was discarded and Roman law was written in Greek characters and explained by Greek judges. The Emperor became an Asiatic despot, worshipped as the god-like kings of Thebes had been worshipped in the valley of the Nile, three thousand years before. When missionaries of the Byzantine church looked for fresh fields of activity, they went eastward and carried the civilisation of Byzantium into the vast wilderness of Russia.
As for the west, it was left to the mercies of the Barbarians. For twelve generations, murder, war, arson, plundering were the order of the day. One thing--and one thing alone--saved Europe from complete destruction, from a return to the days of cave-men and the hyena.
This was the church--the flock of humble men and women who for many centuries had confessed themselves the followers of Jesus, the carpenter of Nazareth, who had been killed that the mighty Roman Empire might be saved the trouble of a street-riot in a little city somewhere along the Syrian frontier.
HOW ROME BECAME THE CENTRE OF THE CHRISTIAN WORLD
The average intelligent Roman who lived under the Empire had taken very little interest in the gods of his fathers. A few times a year he went to the temple, but merely as a matter of custom. He looked on patiently when the people celebrated a religious festival with a solemn procession. But he regarded the worship of Jupiter and Minerva and Neptune as something rather childish, a survival from the crude days of the early republic and not a fit subject of study for a man who had mastered the works of the Stoics and the Epicureans and the other great philosophers of Athens.
This attitude made the Roman a very tolerant man. The government insisted that all people, Romans, foreigners, Greeks, Babylonians, Jews, should pay a certain outward respect to the image of the Emperor which was supposed to stand in every temple, just as a picture of the President of the United States is apt to hang in an American Post Office. But this was a formality without any deeper meaning. Generally speaking everybody could honour, revere and adore whatever gods he pleased, and as a result, Rome was filled with all sorts of queer little temples and synagogues, dedicated to the worship of Egyptian and African and Asiatic divinities.