A city between rivers
By roughly 3350–3100 BCE, Uruk in southern Mesopotamia had become a large urban settlement. Agriculture on the surrounding plain depended on river water and irrigation. Grain, animals and materials for crafts flowed into the city. As its population gathered, houses, workshops and monumental buildings occupied an expanding area. Urban livelihoods remained closely connected to farming communities and to supplies brought from farther away.
Organizing large works
Building districts such as Eanna preserve large mud-brick structures repeatedly rebuilt over time. Construction required people to prepare bricks, move materials and coordinate labor. Economic activities associated with religious institutions brought land, harvests, crafts and workers into larger arrangements. More specialized work depended on supplies of food and on the distribution of products, making these practical tasks central to keeping the city functioning.
Seals and accounts
The variety of goods handled in the city encouraged more elaborate administrative tools. Cylinder seals rolled continuous designs into wet clay, marking containers and sealings. Numerical signs and tablets recorded commodities and quantities. Administrators could preserve evidence of receipts, storage and disbursement. Early writing developed within this work, turning particular transactions into records that could be retained and checked.
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Urban connections
Uruk-period objects, seals and administrative practices occur across a wider region, reflecting trade, migration and exchanges of knowledge. Cities needed agricultural hinterlands as well as materials unavailable nearby, encouraging connections beyond the southern plain. Uruk’s expansion brought large construction projects, specialized labor and written administration together. These arrangements became recurring features of urban societies in Mesopotamia.