And when i say much larger i mean larger then all the other cities put together, it seems there was a fourth line of walls encompassing area below the mountain, all that is left of it are Western Watchtower and Whitewatch tower but there are peaces of masonry here and there which seem to be remnants of this wall, and the aforementioned towers don't look like they were originally designed to be self standing Whitewatch in particular still has remnants of the gate attached to it, this gate has no purpose anymore but it had to have had one once.