Sanandaj (Sanandij) is located in the center of the Kurdestan province. It is limited to Divandareh from the north and to Kamyaran from the south, to the east are Bijar and Qorveh, to the west are the townships of Marivan and Saqez. Sanandaj is the provincial capital of Kurdestan and lies at a distance of 500 km. from Tehran. This city has a beautiful natural environment and pleasant climate specially in autumn and spring. Soleiman Khan Ardalan the governor of Kurdestan constructed the Sahneh Dej (castle) during the Shah Safi period (1038-1052 AH.).
In the past, there was the Seer city instead of present Sanandaj. Sanandaj was under the control of the Ardalan household for duration of four centuries. The said are descendant of the Sassanids. In the war between Iran and Ottomans in Safavid period, this family sometimes sided Iran and sometimes the Ottomans. In 1146 AH., Karim Khan Zand destroyed Sanandaj. After a period of chaos, Khosrow Khan Ardalan took over the power. From 1214 to 1240 AH. Emam Allah Khan, son of Khosrow Khan governed in Sanandaj and to some extent he worked for the sake of improvement of Sanandaj. In 1284 AH. due to the dissatisfaction of the inhabitants, Haj Mirza Mo'tamed-o-Doleh the uncle of Naseredin Shah governed in Kurdestan till the year 1291 AH. Now a days Sanandaj is one of the beautiful townships of Iran and Kurdestan province