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Sassanid Kermanshah

In ancient Iranian mythology, construction of the city is attributed to Tahmuras, the third king of Pishdadian dynasty. It is believed that the Sassanids have constructed Kermanshah and Bahram IV (he was called Kermanshah, meaning king of Kerman) gave his name to this city.

It was a glorious city in Sassanid period about the 4th century AD when it became the capital city of Persian Empire and a significant health center serving as the summer resort for Sassanid kings. In AD 226, following a two-year war led by the Persian Emperor, Ardashir I, against " Kurdish " tribes in the region, the empire reinstated a local "Kurdish" prince, Kayus of Medya, to rule Kermanshah. At the time, the term " Kurd " was used as a social term, designating Iranian nomads, rather than a concrete ethnic group. The word became an ethnic identity in the 12th and 13th century. Within the dynasty known as the House of Kayus (also Kâvusakân) remained a semi-independent kingdom lasting until AD 380 before Ardashir II removed the dynasty's last ruling member.