But in about 2334 BC, everything changed. A Semitic king, Sargon of Akkad, overthrew the ruler of Uruk (then the leading city), and from his capital near Babylon, went on to conquer Mesopotamia. The realm founded by Sargon lasted less then 150 years, but shortly after it fell, Ur became the leader of the Mesopotamian community. Under its Third Dynasty of rulers (2113–2001 BC), the city reached the pinnacle of its glory as an imperial capital of Sumer. This outstanding period in Ur’s history was inaugurated by the reign of Ur-Nammu (2113-2095 BC), who built on Sargon’s realm to carve out an empire of his own.Trade extended Sumer’s influence still farther. Ships from Ur traded along the Arabian coast, sailing through the Strait of Hormuz, around Iran, and into the Indus Valley. Wealth poured into Ur-Nammu’s city. Wood, previous stones, and silver flowed down the Euphrates from Lebanon and the Amanus mountains (Nur Daglari) in Hatay province of modern Turkey.
From Arabia came gold and incense, and a great trading depot grew up on Dilmun, theisland of Bahrain in the Persian Gulf. Tin and lapis lazuli reached Ur from Iran and the Caucasus. Copper arrived from Oman, a place known to the Sumerians as Magan. From Meluhha, the Indus region, came timber and beads of agate, carnelian and ivory. Merchants arriving at Ur would first have passed through the immense mud-brick ramparts erected by Ur-Nammu to product his capital. They completely encircled the city, ‘like a yellow mountain’, in the king’s own words.The capital was also almost entirely surrounded by water. A man-made canal, acting as a moat, extended the natural course of the Euphrates which washed the western walls. Two harbours lay to the north and west of the city, with bustling docks, warehoused, and quays.Ur-Nammu was a builder of astonishing energy. Monuments dedicated by him during his reign have been found throughout the city, which covered an oval area of some 60 ha (148 acres), and housed an estimated population of 24,000 people. Towering above all other buildings in the city was a great staged pyramid dedicated to the Moon god, Nanna, patron deity of the settlement.
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