Isfahan Rug
Isfahan rugs originate from Isfahan, located between two mountain ranges just south of Tehran, Isfahan is the capital city of the province. The weaving of Isfahan rugs dates back to the 16th century. During its peak in the 17th century Isfahan became the capital of Iran. The most sought after Isfahan rugs are made by the very famous master weaver, Serafian. These rugs are in such great demand that a whole industry of counterfeit Serafian traditional rugs now exists. Buyer beware. The best protection is to purchase Isfahan rugs only from a reputable dealer who will provide a certificate of authentication. The skilled artisans of authentic Isfahan rugs ply their trade using Persian knots with varying KPSI (knots per square inch), depending on the quality of the rug.[citation needed]