'City wall' in the Bible

When they sound a long blast with the ram's horn, as soon as you hear the sound of the trumpet, then the entire army is to cry out loud, the city wall will collapse, and then all of the soldiers are to charge straight ahead."

So the woman replied, "Watch this! His head will be thrown to you over the city wall." Then the woman wisely went back to her people. They cut off the head of Bichri's son Sheba and threw it out to Joab, so Joab sounded his battle trumpet and they withdrew from the city. Everybody went back home and Joab returned to the king at Jerusalem.

The rest of the Aramean army retreated into Aphek, but the city wall collapsed on 27,000 soldiers who had taken shelter there. Ben-hadad himself ran away and hid inside a closet somewhere in the city.

While the king of Israel was walking along the city wall, a woman cried out to him. "Help me, your majesty!" she said.

When the king heard what the woman said, he ripped his garments as he continued walking along the city wall. As the people watched, all of a sudden they noticed he was wearing sackcloth underneath his clothes, inside next to his flesh!

but his disciples took him one night and let him down through the city wall by lowering him in a basket.

The foundations of the city wall were decorated with all kinds of gems: The first foundation was jasper, the second sapphire, the third agate, the fourth emerald,