Chalcolithic Age Ubaid period Eridu is one of the earliest settlements in the region, founded 6th millennium BC| during the early
Ubaid period, at that time close to the
Persian Gulf near the mouth of the
Euphrates, although in modern times it is about 90 miles inland. Excavation has shown that the city was founded on a virgin sand dune site with no previous habitation. Eighteen superimposed mudbrick temples at the site (see above, section "Architecture") underlie the unfinished
ziggurat of
Amar-Sin (c. 2047–2039 BC). Levels XIX to VI were from the Ubaid period and Levels V to I were dated to the
Uruk period. During the
Ubaid period the site extended out to an area of about 12 hectares (about 30 acres). Twelve neolithic clay tokens, the precursor to
Proto-cuneiform, were found in the Ubaid levels of the site. File:Bowl MET DP104229.jpg|Bowl; mid 6th–5th millennium BC;
ceramic; 6.99 cm; Tell Abu Shahrain;
Metropolitan Museum of Art File:Bowl MET DP104228 (cropped).jpg|Bowl excavated in the Ubaid Cemetery at Eridu (Grave 134) File:Bowl MET DP104227.jpg|Bowl; mid 6th–5th millennium BC; ceramic; Tell Abu Shahrain; Metropolitan Museum of Art File:Cup MET ME49 133 5.jpg|Cup; mid 6th–5th millennium BC; ceramic; 8.56 cm; Tell Abu Shahrain; Metropolitan Museum of Art
Uruk period Significant habitation was found from the Uruk period with "non-secular" buildings being found in soundings. Uruk finds included decorative terracotta cones topped with copper, copper nails topped with gold, a pair of basalt stone lion statues, columns several meters in diameter coated with cones and gypsum, and extensive Uruk period pottery.
Early Bronze Age Early Dynastic Period Occupation increased in the Early Dynastic period with a monumental palace being constructed. In Early Dynastic IIIA (c. 2750/2600-2500 BCE), an inscription of
Elulu, a ruler of the
First Dynasty of Ur (), was found at Eridu. In Early Dynastic IIIB (c. 2500-2350 BCE), a statue of the ruler
Entemena of
Lagash (c. 2400 BCE) reads: "he built Ab-zupasira for Enki, king of Eridu ...". According to the excavators, construction of the
Ur III ziggurat and associated buildings was preceded by the destruction of preceding construction and its use as leveling fill so no remains from that time were found. At a small mound 1 kilometer north of Eridu two Early Dynastic III palaces were found, with an enclosure wall. The palaces measured 45 meters by 65 meters with 2.6 meter wide walls and were constructed in the standard Early Dynastic period method of plano-convex bricks laid in a herringbone fashion. Three Third Dynasty rulers designated Year Names based on the appointment of an
en(tu)-priestess (high priestess) of the temple of Enki in Eridu, the highest religious office in the land at that time. In each the first two cases it was also used as the succeeding Year Name. •
Sulgi Year 28 – "Year the szita-priest-who-intercedes-for-Szulgi, the son of Szulgi, the strong man, the king of Ur, the king of the four corners of the universe, was installed as en-priest of Enki in Eridu" •
Amar-Sin Year 8 – "Year (Ennune-kiag-Amar-Sin) Ennune-the beloved (of Amar-Sin, was installed as en-priestess of Enki in Eridu)" •
Ibbi-Sin Year 11 – "Year the szita-priest who prays piously for Ibbi-Sin was chosen by means of the omens as en-priest of Enki in Eridu" File:Fired clay brick stamped with the name of Amar-Sin, Ur III, from Eridu, currently housed in the British Museum.jpg|Fired clay brick stamped with the name of Amar-Sin, Ur III, from Eridu, currently housed in the British Museum In this period, at nearby Ur, a temple of Ishtar of Eridu was built by
Lagash's ruler
Ur-Baba. The Ur III ruler
Ur-Nammu) also recorded building a temple of Ishtar of Eridu at Ur which is assumed to have been a rebuild.
Middle Bronze Age Isin-Larsa period After the fall of Ur III the site was occupied and active during the
Isin-Larsa period (early 2nd Millennium BC) as evidenced by a Year Name of
Nur-Adad, ruler of Larsa "Year the temple of Enki in Eridu was built" and prior texts of Isin rulers
Ishbi-Erra and
Ishme-Dagan showing control over Eridu. Inscribed construction bricks of Nur-Adad have also been found at Eridu.
Lament for Eridu The fall of early Mesopotamia cities and empires was typically believed to be the result of falling out of favor with the gods. A genre called
City Laments developed during the
Isin-Larsa period, of which the
Lament for Ur is the most famous. These laments had a number of sections (kirugu) of which only fragments have been recovered. The
Lament for Eridu describes the fall of that city.
Old Babylonian period This continued in the
Old Babylonian period with Hammurabi stating in his 33rd Year Name "Year Hammu-rabi the king dug the canal (called) 'Hammu-rabi is abundance to the people', the beloved of An and Enlil, established the everlasting waters of plentifulness for Nippur, Eridu, Ur, Larsa, Uruk and Isin, restored Sumer and Akkad which had been scattered, overthrew in battle the army of Mari and Malgium and caused Mari and its territory and the various cities of Subartu to dwell under his authority in friendship"
Late Bronze Age In an inscription of
Kurigalzu I (), a ruler of the
Kassite dynasty one of his epitaphs is "[he one who ke]eps the sanctuary in Eridu in order".
Iron Age An inscription of the
Second Sealand Dynastic ruler
Simbar-shipak (c. 1021–1004 BCE) mentions a priest of Eridu.
Neo-Assyrian period The
Neo-Assyrian emperor Sargon II (722–705 BCE) awarded
andurāru-status (described as "a periodic reinstatement of goods and persons, alienated because of want, to their original status") to Eridu.
Neo-Babylonian period The Neo-Babylonian ruler
Nebuchadnezzar II (605–562 BC) built at Eridu as evidenced by inscribed bricks found there. ==Mythology==