Salmas is situated on the plains its center being the city of Salmas (formerly known as Shahpour in the Pahlavi reign), which lies 854 km. from Tehran. In ancient books Salmas has been noted for being a city with good bazaars and a mosque constructed of stone. Excavations here from the hillock of Bitan have related Salman to the Medes. In the Achaemenian times, Salmas was known as Zarvand. Due to the fact of its position, that is stranding between Iran and Rome, this city after the fall of Khosrow Ashkani came under the hands of the Sassanians.