Not bad engineering to make it through a handful of civil wars, a Blitz, and a couple thousand V-1 rockets mostly intact. You have to wonder how long all the steel and concrete that's been laid around the Thames from our civilization will last.
Most of the wall has been plundered for stone and to make way for new development over the past millennium. Its not conflict that has destroyed 2 miles of a 6m high 3m thick wall, it's peace :)
