Jemdet Nasr
The importance of these finds was realized immediately and the Jemdet Nasr Period (named after the eponymous type site) was officially defined at a conference in Baghdad in 1930, where at the same time both the Uruk and Ubaid periods had been defined. It has later been shown that some of the material culture that was initially thought to be unique for the Jemdet Nasr Period also occurred during the preceding Uruk Period and the subsequent Early Dynastic Period. Nevertheless, it is generally believed that the Jemdet Nasr Period is still sufficiently distinct in its material culture as well as its socio-cultural characteristics to be recognized as a separate period. Since the first excavations at Tell Jemdet Nasr, the Jemdet Nasr Period has been found at numerous other archaeological sites across much of south-central Iraq, including Abu Salabikh, Shuruppak, Khafajah, Nippur, Tell Uqair, Ur, and Uruk.