But empires move, though rulers bid them stand still.
To the petty states this meant only a change of masters; they now became part of one of the largest empires of antiquity.
In 803 and 810 he made a treaty with Charlemagne, by which the limits of the two empires were amicably fixed.
On the other are all the states formed out of the colonial empires of Spain and Portugal.
The two great empires, Assyria and Babylon, which grew up on the banks of the Tigris and Euphrates, can be separated as little historically as geographically.