Located at the far-flung and wild edge of the Roman Empire, Hadrian's Wall was the mighty physical frontier constructed by Emperor Hadrian in the 120s AD. Vast in size and stretching from the east to the west cost of the province of Britannia, it took ten years and thousands of hands to build the 73 miles of wall and its impressive forts. Perhaps the greatest physical reminder and monument of Roman Britain, the remnants of the wall are still visible on the uplands of Cumbria and Northumberland t