plastic acrylic are now used. Prior to the development of weaving and related approaches using twisted strands, fabrics were made from single sheets of material, such as animal skins. Felting was an invention that allowed for the creation of a textile from fleece that had been sorted, combed, laid out in thin sheets that were then rolled or agitated with other friction until the tiny barbules on the fiber twisted and connected. This process created a smooth connected textile that could be cut, sewn or used in other ways. Evidence of felting was found in burial vaults in Siberia of the 7th or 8th century B.C. Weaving, however, has been the dominant way to produce clothes. In some cultures, weaving forms demonstrate social status. The more intricate the weaving, the higher the status. Certain symbols and colors also allowed identification of class and position. For example, in the ancient Incan civilization, black and white designs indicated a military status. In order for the fiber that will be used in weaving (whether plant or animal) to be made into cloth or clothing, it must be spun (or twisted) into a strand known as yarn. When the yarn is ready and dyed for use it can be made into cloth in a number of ways. Knitting and crochet are common methods of twisting and shaping the yarn into garments or fabric. The most common use of yarn to make cloth is weaving. In weaving, the yarn is wrapped on a frame called a loom and pulled taut vertically. This is known as the warp. Then another strand of yarn is worked back and forth wrapping over and under the warp. This wrapped yarn is called the weft. Most art and commercial textiles are made by this process. In Europe between the fourteenth and seventeenth centuries woven pieces called "tapestries" took the place of paintings on walls. The Unicorn in Captivity is part of a series consisting of seven tapestry panels known as The Hunt of the Unicorn by Franco Flemish from this time period. Much of the art at the time in history was used to tell common folktales that also had a religious theme. As Mark Getlein wrote, "Tapestry is a special type of weaving in which the weft yarns are manipulated freely to form a pattern or design on the front of the fabric...Often the weft yarns are of several