'Walls' in the Bible

Has it not come to your ears how I did it long before, purposing it in times long past? Now I have given effect to my design, so that by you strong towns might be turned into masses of broken walls.

So an opening was made in the wall of the town, and all the men of war went in flight by night through the doorway between the two walls which was by the king's garden; (now the Chaldaeans were stationed round the town:) and the king went by the way of the Arabah.

And the walls round Jerusalem were broken down by the Chaldaean army which was with the captain.