despite this good start, the wall was abandoned after only twenty years. the garrisons were sent back to hadrian's wall. in 208 the emperor septimius severus re-established legions at the wall and ordered repairs. this has led to the wall being referred to as the severan wall. however, this occupation ended only a few years later, and the wall was never fortified again. most of the wall and its associated fortifications have been destroyed over time, but some remains are still visible. many of these have come under the care of historic scotland and the unesco world heritage site committee. most of the wall is private property.