Head of a Guardian Figure (dvarapala), Tang dynasty, 618-907, c. 735, China, Shanxi province, Tianlongshan, Cave 17. Light gray stone with traces of gesso and pigment, H. 36 x W. 17.2 x D. 19 cm (14 3/16 x 6 3/4 x 7 1/2 in.). Harvard Art Museums/Arthur M. Sackler Museum, Bequest of Grenville L. Winthrop, [1943.53.40](https://hvrd.art/o/204426). Model courtesy of [Tianlongshan Caves Project](https://tls.uchicago.edu/), CAEA, University of Chicago.