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The city was a capital of the Persian Empire under Safavids in 1548-1598. It is a provincial capital today that has been an important cultural center throughout history.Archeological findings in the Qazvin plain reveal urban agricultural settlements for at least nine millennia. Qazvin geographically connects Tehran, Isfahan, and the Persian Gulf to the Caspian seacoast and Asia Minor, hence its strategic location throughout the ages.The city today known as Qazvin is thought to have been founded by Shapur II, King of Persia in 250 CE, under the name Shad Shahpur (shad can be read as ‘happy’), when he built a fortification there to control regional tensions.