The Uruk period (ca. 4000 to 3100 BC; also known as Protoliterate period) existed from the protohistoric Chalcolithic to Early Bronze Age period in the history of Mesopotamia, after the Ubaid period and before the Jemdet Nasr period.[1] Named after the Sumerian city of Uruk, this period saw the emergence of urban life in Mesopotamia and the Sumerian civilization.[2] The late Uruk period (34th to 32nd centuries) saw the gradual emergence of the cuneiform script and corresponds to the Early Bronze Age; it has also been described as the "Protoliterate period".[3][4]

It was during this period that pottery painting declined as copper started to become popular, along with cylinder seals.[5]

Ardashir I Shapur I Hormizd I Bahram I Bahram II Bahram III Narseh Hormizd II Adur Narseh