home of Sumerians in southern Mesopotamia, in present-day Iraq, Ur most important city.
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'''Sumer''' was the land of [[Sumerians]] in southern [[Mesopotamia]], in present-day [[Iraq]]. [[Ur]] was the most important city. The Sumerians' greatest invention was [[cuneiform]] writing. They also invented the first codes of law, the first [[city-states]], the seed plow, the sailboat, and the potter’s wheel.