Erbil Citadel in the Kurdistan Region of Iraq is one of the longest continuously inhabited settlements in the Middle East, and possibly the world.
Erbil Citadel is a rare surviving example of a formerly fortified settlement which has grown up on the top of an imposing ovoid-shaped tell.
The overall form of the citadel town is circular but more elliptical to be precise. It rises some 30 meters above the ground level of the lower city .