Genuine Persian rugs have a complex, “calligraphic” character. Pattern and line are the most important features of Persian carpets which make them truly stand out from the rest. However, sometimes, Persian weavers implement motifs in the geometric style into their designs which results in abstract or stylized angular figures. Nonetheless, the curvilinear style has always dominated in Persian rugs and is the reason behind their worldwide success. Despite tribal wars, migrations, rebellions, and commercial impact, the art of Persian rug-weaving has endured and flourished. Rug-weaving methods developed by ancient oriental cultures are so refined that they have changed very little over time.