Since the sixth century, Buddhist cave temples in northern China have housed a magnificent array of sculptures of Buddha, his attendants, and many other figures. In the early 1900s, looters raided the caves and chiseled off heads, hands, and feet from the sculptures. The severed parts of the sculptures have found their way into various private collections throughout the world. For the past six years, the University of Chicago's Center for the Art of East Asia has engaged in a research and 3-D digital reconstruction project focused on the caves. An international team of experts tracked down and photographed the missing parts of the sculptures, and then, using scholarly research and cutting-edge technology, the experts reconstructed the original appearance of the caves. The Smart Museum has mounted an exhibit, called "Echoes of the Past," where visitors can view a virtual representation of the caves with missing parts of the statues digitally superimposed. The exhibit is available for viewing, free, through Sunday, January 16, 2011. On the closing day, the museum will conduct a Curator Tour at 2 p.m.