'City wall' in the Bible

in the eleventh year of Zedekiah, in the fourth month, in the ninth day of the month, the city wall was breached.

Then the city wall was broken through, and all the men of war fled, and went forth out of the city by night by the way of the gate between the two walls, which was by the king's garden; (now the Chaldeans were by the city round about:) and they went by the way of the plain.