hoy plain in Northwestern Iran with its appropriate climate condition and suitable environmental capacities, had a particular importance in archeology of different prehistoric and historical periods. Archaeological finds shows that, in the Early Bronze Age (Kura-Araxes) period, Douzdaghi site with more than 16 hectares, becomes a very important and major center of urbanization in north of the Lake Urmia. Based on the the Khoy plain survey results, 12 sites related to Early Bronze Age period. Douzdaghi is one of the most important and largest of them, which located in central of the plain. Unlike the previous period, which the settlements were observed only in the plain, during the Bronze Age settlements were found in the plains and highlands and we are faced with changing in settlements patterns. At the beginning of the third millennium BC, there are widespread socio-cultural changes for most regions of Iran. The northwestern region of Iran, along with the Araxes Basin and the Kura River basin, is probably the pioneer in these changes. Due to its location, Dozdaghi located on the junction routes of the Iranian plateau to Anatolia in one hand and southern Caucasus in the other hand, specially in trade and cultural exchanges. The existence of a salt mine as an export commodity in this area as well as tools of obsidian (imported goods) in seven different types, there is good evidence for this connection.
