The Uruk period (ca. 4000 to 3100 BC) existed from the protohistoric  Chalcolithic to Early Bronze Age  period in the history of Mesopotamia, following the Ubaid period and succeeded by the Jemdet Nasr period. Named after the Sumerian city of Uruk, this period saw the emergence of urban life in Mesopotamia. It was followed by the Sumerian civilization. The late Uruk period (34th to 32nd centuries) saw the gradual emergence of the cuneiform script and corresponds to the Early Bronze Age; it may also be called the Protoliterate period. It was during this period that pottery painting declined as copper started to become popular, along with cylinder seals.