An Tangka artist makes a piece of Tangka at Norbu Lingka in Lhasa, capital of southwest China\'s Tibet Autonomous Region, Aug. 3, 2013. The third Tangka Art Exposition lowered its curtain on Saturday here as a total of over 230 pieces of Tangka works were displayed during the nine-day exhibition. Originated from Tang Dynasty, Tangka is a unique style of traditional Tibetan scroll paintings found only in China\'s Tibetan areas.