Hal Lindsay (Author, Prophecy Teacher) has stated in the past:
It is interesting to see in history how men have attempted to put together the Old Roman Empire. Charlemagne tried to do this in A. D. 800. His “Roman Empire” included what are now the countries of France, Germany, Italy, Holland and Belgium. Charlemagne was crowned by the Pope as Emperor Charles Augustus. But his empire was not the ten nation confederacy of the Scriptures.
Napoleon tried his strutting best to establish his own Roman Empire. Another Pope, Pius VII, made a tedious trip across the Alps to Notre Dame cathedral in Paris to place an imperial crown on Napoleon, but the new little Caesar snatched the crown from the Pope and put it on himself. His empire was not the revived Roman Empire, either.
And then there was Hitler. Does anyone doubt that he attempted to put Rome together again? He said his Third Reich would last a thousand years. God had other plans and Hitler lost.