Murals from Kala-i Kafirnigan (Kalai Kafirnigan), Tajikistan, Museum of National Antiquities, Dushanbe, Tajikistan <a rel="nofollow" class="external text" href="https://books.google.com/books?id=DhiWDwAAQBAJ&amp;pg=RA1-PA204">Reference 1, with photograph</a>, <a rel="nofollow" class="external text" href="https://www.jstor.org/stable/pdf/43485384.pdf?refreqid=excelsior%3Af8a92d1d5ed703924239443ee487259d">Reference 2</a>
Robert Wilson
<p><a rel="nofollow" class="external autonumber" href="https://www.flickr.com/photos/10186213@N07/16981380358">[1]</a><br></p>
PD-Art: Non-creative photograph of a two-dimensional work of art in the Public Domain (7-8th century CE)