"Center" referring to the capital of the Safavid empire: Tabriz,
Qazvin, and Isfahan were all the capital of the Safavid empire at
different points in its existence. Tabriz is located in the current
East Azerbaijan Province. Qazvin is the current capital of the
Province of Qazvin. Ishafan is the current capital of Isfahan
Province. All are within the modern country of Iran.