Encyclopedia > 31st century BC

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31st century BC

(32nd century BC - 31st century BC - 30th century BC - other centuries)

(5th millennium BC - 4th millennium BC - 3rd millennium BC)

Events:

Significant persons:

Ur-nina[?] first king of Lagash in Mesopotamia

Inventions, Discoveries, Introductions:

Chinese ideograms
Drainage and sewage system in India
Dams, canals, stone sculptures[?] using inclined plane and lever in Sumeria
Pyramids in Ancient Egypt
Copper was in use, both as tools and weapons.
Crude writing existed in Egypt, and cuneiform writing was invented in Mesopotamia.

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