Eridu (known today as Tell Abu Shahrin) is located about 20 kilometers (12.5 miles) southwest of the famous city of Ur.
As its modern name indicates, the archaeological site is a mound, a huge mound that was formed over thousands of years as a result of the construction of new settlements on the ruins of previous buildings.
The hill is 7 meters (23 feet) high, and consists of 18 levels of occupation, according to archaeological excavations.
The greater part of this has been dated to the Ubaid and Uruk periods

(Picture)
Baked brick pieces used in the construction of the Sumerian ziggurat at Eridu, southwest of Nasiriyah, Iraq, stamped with the name of King Ur-Nammu (2123-2106 BC).
(David Stanley/CC BY 2.0)