Bahrain was a central location of the ancient Dilmun civilization. Bahrain's strategic location in the Persian Gulf has brought rule and influence from mostly the Persians, Sumerians, Assyrians, Babylonians, Portuguese, the Arabs, and the British. Dilmun Civilization Bahrain was a central site of the ancient Dilmun civilization. Dilmun appears first in Sumerian cuneiform clay tablets dated to the end of fourth millennium BC, found in the temple of goddess Inanna, in the city of Uruk. The adjective Dilmun is used to describe a type of axe and one specific official; in addition there are lists of rations of wool issued to people connected with Dilmun. Dilmun was mentioned in two letters dated to the reign of Burna-Buriash II (c. 1370 BC) recovered from Nippur, during the Kassite dynasty of Babylon. These letters were from a provincial official, Ilī-ippašra, in Dilmun to his friend Enlil-kidinni in Mesopotamia. The names referred to are Akkadian. These letters and other documents, hint at an administrative relationship between Dilmun and Babylon at that time. Following the collapse of the Kassite dynasty, Mesopotamian documents make no mention of Dilmun with the exception of Assyrian inscriptions dated to 1250 BC which proclaimed the Assyrian king to be king of Dilmun and Meluhha. Assyrian inscriptions recorded tribute from Dilmun. There are other Assyrian inscriptions during the first millennium BC indicating Assyrian sovereignty over Dilmun. Dilmun was also later on controlled by the Kassite dynasty in Mesopotamia. One of the early sites discovered in Bahrain indicate that Sennacherib, king of Assyria (707–681 BC), attacked northeast Persian Gulf and captured Bahrain. The most recent reference to Dilmun came during the Neo-Babylonian dynasty. Neo-Babylonian administrative records, dated 567 BC, stated that Dilmun was controlled by the king of Babylon. The name of Dilmun fell from use after the collapse of Neo-Babylon in 538 BC. There is both literary and archaeological evidence of extensive trade between Ancient Mesopotamia and the Indus Valley civilization (probably correctly identified with the land called Meluhha in Akkadian). Impressions of clay seals from the Indus Valley city of Harappa were evidently used to seal bundles of merchandise, as clay seal impressions with cord or sack marks on the reverse side testify. A number of these Indus Valley seals have turned up at Ur and other Mesopotamian sites. The "Persian Gulf" types of circular, stamped (rather than rolled) seals known from Dilmun, that appear at Lothal in Gujarat,