THE MIDDLE AGES IS DIVIDED IN: EARLY, HIGH AND LATE.
It is a period of population decline, counterurbanisation, collapse of centralized authority, invasions, and mass migrations of tribes. In the early middle ages with the fall of the Western Roman empire, there were no more limits and reigned the fear. The castles were fortresses and they were built to the top of the mountains and surrounded by deep ditches and thick walls.

devo dire il fatto delle invasioni. celti ecc..
anglosassoni fecero beowulf orale, poi verrà tradotto e scritto