The Kizil Thousand-Buddha Caves are corridors of murals surpassing other existing caves in China in its abundance in content, quantity and long duration. The Caves are significant in Buddhism as well as in the history of Qiuci. Baicheng County, where the Kizil Thousand-Buddha Caves are located, used to be under the reign of ancient Qiuci (today's Kuqa). As a communication hub of the ancient Silk Road, Qiuci was the political and economic center of the West Region as well as the focal point of Central Asian and Indo-European cultures. Several facts support these in the Kizil Thousand-Buddha Caves. The earlier caves took the shape similar to Bamian Caves and the murals suggested the influence of Gandhara arts, a Buddhist visual art prevailing in today's Northwestern Pakistan and Eastern Afghanistan in First Century B.C. and Seventh Century A.D. The written documents from the Kizil Thousand-Buddha Cave were composed in Tocharian B language, a branch of the Indo-European language family that originated in central Asia during the first millennium.