Nomadic Persian tribes from Zanjan province in northern Iran produce incredibly beautiful and hard-wearing hand-made Persian tribal rugs. The Zanjan is lively and bright, made with vegetable dyed wool and a cotton or goat hair foundation. The asymmetrical Persian knot is more common than the symmetrical Turkish double knot, as it is finer and more precise. Living far from the convenience of modern technology, these weavers construct their own horizontal ground looms, which can be easily taken apart and moved from place to place.