Seated Buddha (probably Shakyamuni), Tang dynasty, 618-907, 8th century, China, Shanxi province, Tianlongshan, Cave 21. Light gray sandstone with traces of polychromy, H. 109.5 x W. 75 x D. 47 cm (43 1/8 x 29 1/2 x 18 1/2 in.). Harvard Art Museums/Arthur M. Sackler Museum, Bequest of Grenville L. Winthrop, [1943.53.22](https://hvrd.art/o/204140). Model courtesy of [Tianlongshan Caves Project](https://tls.uchicago.edu/), CAEA, University of Chicago.