Traditional arts and crafts are practiced throughout the country for commercial, decorative, and religious purposes. Woodcarvings and sculptures are especially common. The high-quality clay of the western highlands is used for pottery and ceramics. Other crafts include basket weaving, beadworking, brass and bronze working, calabash carving and painting, embroidery, and leather working. Traditional housing styles use local materials and vary from temporary wood-and-leaf shelters of nomadic Mbororo to the rectangular mud-and-thatch homes of southern peoples. Dwellings of materials such as cement and tin are increasingly common. Contemporary art is mainly promoted by independent cultural organizations (Doual'art, Africréa) and artist-run initiatives (Art Wash, Atelier Viking, ArtBakery).