In southwestern Iran, the first half of the Early Dynastic period corresponded with the Proto-Elamite period. This period was characterized by indigenous art, a script that has not yet been deciphered, and an elaborate metallurgy in the Lorestan region. This culture disappeared toward the middle of the third millennium, to be replaced by a less sedentary way of life. Due to the absence of written evidence and a lack of archaeological excavations targeting this period, the socio-political situation of Proto-Elamite Iran is not well understood. Mesopotamian texts indicated that the Sumerian kings dealt with political entities in this area. For example, legends relating to the kings of Uruk referred to conflicts against Aratta. Aratta had not been identified, but it is believed to have been located somewhere in southwestern Iran.