Eridu was a Sumerian city located at Tell Abu Shahrain, also Abu Shahrein or Tell Abu Shahrayn, an archaeological site in southern Mesopotamia. It is located in Dhi Qar Governorate, Iraq near the modern city of Basra. Eridu is traditionally believed to be the earliest city in southern Mesopotamia based on the Sumerian King List. Located 12 kilometers southwest of the ancient site of Ur, Eridu was the southernmost of a conglomeration of Sumerian cities that grew around temples, almost in sight of one another. The city gods of Eridu were Enki and his consort Damkina. Enki, later known as Ea, was considered to have founded the city. His temple was called E-Abzu, as Enki was believed to live in Abzu, an aquifer from which all life was believed to stem. According to Sumerian temple hymns another name for the temple of Ea/Enki was called Esira (Esirra)."... The temple is constructed with gold and lapis lazuli, Its foundation on the nether-sea (apsu) is filled in. By the river of Sippar (Euphrates) it stands. O Apsu pure place of propriety, Esira, may thy king stand within thee. ..."

Mesopotamia is a historical region of West Asia situated within the Tigris–Euphrates river system, in the northern part of the Fertile Crescent. Today, Mesopotamia is known as present-day Iraq and north-eastern Syria. In the broader sense, the historical region of Mesopotamia also includes parts of present-day Iran, Turkey, and Kuwait.