The art of weaving developed in South Asia at a time when few other civilizations employed it. Excavations at Harappa and Mohenjo-Daro– ancient cities of the Indus Valley Civilization– have established that the inhabitants used spindles and spun a wide variety of weaving materials. Some historians consider that the Indus Valley civilization first developed the use of woven textiles. As of the late 1990s, hand-knotted carpets were among Pakistan's leading export products and their manufacture is the second largest cottage and small industry. Pakistani craftsmen have the capacity to produce any type of carpet using all the popular motifs of gulls, medallions, paisleys, traceries, and geometric designs in various combinations. At the time of independence, manufacturing of carpets was set up in Sangla Hill, a small town of District Sheikhupura. Chaudary Mukhtar Ahmad Member son of Maher Janda introduced and taught this art to locals and immigrants. He is considered founder of this industry in Pakistan. Sangla Hill is now a focal point in Carpet Industry in Pakistan. Almost all the exporters and manufacturers who are running their business at Lahore, Faisalabad and Karachi have their area offices in Sangla Hill.