Bible Verses About Towers: On the walls of cities

For he said unto Judah, Let us build these cities, and make about them walls, and towers, gates, and bars; the land is yet before us, because we have sought Jehovah our God; we have sought him, and he hath given us rest on every side. So they built and prospered.

Moreover Uzziah built towers in Jerusalem at the corner gate, and at the valley gate, and at the turning of the wall, and fortified them.