Heriz (Herez, Serapi) The most beautiful Rugs were woven in Heriz design itself For the last 100 years. The Heriz carpet designs have remained the same, with only small variations in color pallets and density of the design. The late 19th Century Rug (called Serapis) was of fewer details and softer colors and with time designs became denser with added jewel tone color pallets. Even though Sarouk carpets changed style later on, Heriz weavers stayed with the geometric pattern till now. However, Heriz was also a center of production of some of the best handmade carpets with both geometric and curvilinear floral patterns. A special heirloom wash produces the subtle color variations that give rugs their distinctive antique look.