Ching Tsai Loo, commonly known as C. T. Loo, was a controversial art dealer of Chinese origin who maintained galleries in Paris and New York and supplied important pieces for collectors and American museums by illegally exporting a large amount of significant state cultural relics from China. He has been called "the preeminent dealer of Chinese art and artifacts for the first half of the twentieth century," but also criticized for his illegal active role in removing antiques and archaeological treasures from China for sale to western collectors.