Compare the very similar, but slightly smaller head, included in the exhibition, Spirit and Ritual, The Morse Collection of Ancient Chinese Art, Metropolitan Museum of Art, 1982, Catalogue, no. 55 and also illustrated by Hugo Munsterberg, The Arts of China, 1972, p. 94 and pl. 43. A stele with a very similar head in the Shanxi Provincial Museum is illustrated by Saburo Matsubara, Chuugoku Bukkyo Chokukushi Ron (The Path of Chinese Buddhist Sculpture), Tokyo, 1995, vol. 3, no. 4176.