15 fev 2100 ano antes da era comum - Ziggurat at Ur

Descrição:

Ur built at river delta after Sumerians conquer Akkadians
Harbor built into the city for trade with central walled citadel on raised platform, surrounded by low rise homes

Ziggurat:
Viewed as home of a god, built of fired brick in tiered structure with axial staircases
Finely planned with form having spiritual significance, made with uniform brick mold

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