For more than 5 centuries all European lands south of the rivers Rhine and Danube had been a part of the Roman Empire.
But now the empire was gone.
Europe had to deal with a new situation. A new Age started.
We call the period after the fall of the Western Roman Empire: the Middle Ages.
The Middle Ages lasted from AD 500 until 1500.
The Middle Ages are then split up in two:
The Time of Monks and Knights, from AD 500 - 1000
The Time of Cities and States, from AD 1000 - 1500