'Citadel' in the Bible

You saw that the breachesIn the wall of the City of David [the citadel of Zion] were many;You collected [within the city’s walls] the waters of the Lower Pool (Siloam).

Look [at] the land of the Chaldeans! {This people no longer exists. Assyria destined} it for wild animals. They erected its siege towers; they demolished its citadel fortresses. It made her like a ruin.

For you have made the city a heap of rubble, the fortified city into a ruin; the foreigners' citadel is no longer a city it will never be rebuilt!

"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,

And thorns shall go up her citadel fortress, weeds and thistle plants in her fortresses; and it shall be [the] settlement of jackals, green grass for [the] daughters of an ostrich.