With the translation of the seat of the Roman Empire to Charlemagne, Aachen became the New Rome with it's Cathedral seat of the Holy Roman Empire together with that of Rome, for over seven hundred years, the most glorious years in the history of humanity, the years of Christian Europe as the invasions of Islam was overthrowing Byzantium!
There is a new Charlemagne Museum right beside the square of the Imperial Cathedral and Palace of Aachen, inaugurated last year, the 1200th anniversary of the 814 death of that great Christian King.