Jemdet Nasr
A number of cylinder seals, stamp seals and cylinder seal impressions on the clay tablets have been found at Jemdet Nasr. Stylistically, these seals are a continuation of the preceding Uruk period. The cylinder seals display humans as well as animals in a very crude style. Over 80 of the clay tablets bore a sealing, showing humans, animals, buildings, containers and more abstract designs. None of the sealings on the tablets was made by the seals that were found at the site, indicating that sealing either occurred outside Jemdet Nasr or that seals could also be made of perishable materials. One sealing, found on thirteen tablets, lists the names of a number of cities surrounding Jemdet Nasr, including Larsa, Nippur, Ur and Uruk.