The Neo-Sumerian Dynasty (also known as the Third Dynasty of Ur or Ur III) was a kingdom based in the city of Ur (modern Tell el-Muqayyar, Iraq) in southern Mesopotamia. Ur-Nammu founded the dynasty after he vanquished the forces of Lagash in battle, killing the rival king himself. For a relatively short period (ca. 2112–2004 BCE) the Neo-Sumerian state was the preeminent power in the region. A cuneiform inscription in the Sumerian language, known as the Code of Ur-Nammu, documents the laws the king enacted. In ca. 2004 BCE the Elamites were able to surround and sack Ur and take the last Neo-Sumerian king, Ibbi-Sin, into captivity, ending the dynasty.

The art of the Neo-Sumerian period was centered on royalty and divinity. The styles and conventions of the city-states of Sumer in the previous millennium were revived. Neo-Sumerian art  was also influenced by the Akkadians, who had dominated Mesopotamia in the preceding period. The Neo-Sumerian dynasty oversaw the construction of the Ziggurat of Ur, the largest and best-preserved ziggurat in Mesopotamia. Web resources here and here.

Cylinder seal of Hash-hamer (?) (l.) with impression (r.). Greenstone. Neo-Sumerian. Ca. 2100 BCE. British Museum, London. The enthroned king on the right may be Ur-Nammu.