A series of settlements on an oasis in the Kirman province, Iran, dated from the late 4th millennium BC. A series of floods in prehistoric times destroyed most buildings, but left brick-lined tombs and many artifacts suggesting that Shahdad was an important manufacturing and trading center in the first half of the 3rd millennium BC, contemporary with the Early Dynastic period in Mesopotamia. There were a number of almost life-size unbaked clay statues found lying in the graves, face to face with the corpses, presumed to be actual portraits of the dead people. Bronze, copper, and silver was locally worked and made into tools, decorated vessels, ornaments, and cylinder seals. Other finds include vessels of steatite and alabaster, and beads of agate, carnelian, and lapis lazuli. A very early form of writing appears on pottery, sometimes incised, sometimes impressed with seals; some 700 different pictographic symbols have been identified, occurring singly or in groups of up to five symbols. The evidence documents the emergence of stratified societies during the 3rd millennium BC.