Located in a plain, Somiehsara is 369 km. from Tehran. This city enjoys a mild and humid climate, and the Masooleh river irrigates its lands. This region included the centers of the two states of Toolem and Kasgar that are repeatedly pointed out in historical books. According to some references, this city is named after the great gnostic of the 4th and 5th century AH., 'Sheikh Abdollah Somehi' who had many followers and constructed several monasteries. In keeping with some narrations, this city was ruined in the year 1159 AH. This city was beyond the control of Aqa Mohammad Khan Qajar, but during the reign of Fath Ali Shah Qajar, the central government dominated over it. At present this city is one of the developed regions of the province with many natural attractions.