'Watchtower' in the Bible

He plowed its land and cleared it of stones. Then he planted it with the choicest vines, built a watchtower in the middle of it, and dug a wine vat in it; He expected it to produce good grapes, but it produced only wild ones."

Then the lookout shouted: "Upon a watchtower I stand, O Lord, continually by day, and I am stationed at my post throughout the night.

"For the palace will be abandoned, the noisy city deserted; the citadel and watchtower will become barren wastes forever, the delight of wild donkeys, and a pasture for flocks,