Kermanshah the capital of Kermanshah Province, is located 525 kilometres (326 miles) from Tehran in the western part of Iran.
According to the 2011 census, its population is 851,405. A majority of the population speaks Southern Kurdish. Kermanshah has a moderate and mountainous climate. Kermanshah province is the largest Kurdish-speaking city in Iran.
Most of the inhabitants of Kermanshah are Shia Muslims, but there are minorities such as Sunni Muslims, Yarsanism and so on. Kermanshah is the principal city in this region, and also one of the tourist Attractions in Iran.
With an altitude of about 1200 m above sea level, it has a moderate and mountainous climate. According to 2006 census, the population of this city was about 950400.
Because of its antiquity, attractive landscapes, rich culture and Neolithic villages, Kermanshah is considered one of the cradles of prehistoric cultures. According to archaeological surveys and excavation, the Kermanshah area has been occupied by prehistoric people since the Lower Paleolithic period.
Kermanshah has been always the link between Iranian plateau and the Mesopotamia throughout its history. In the fourth millennium BC, the region currently known as Kermanshah province, was one of the most important centers of trade and commerce with Mesopotamia.
There were also many conflicts and wars between these two nations. Therefore, this region used to be the center of various Iranian and Mesopotamian civilizations and governments for centuries.
During the reign of Abbasid caliphs, it was an important city because of its strategic location. In 1220 A.D., after Mongol invasion of Iran, Kermanshah was badly damaged again.