Byzantine emperor St. Constantine  with mother St. Elena. From frescos in Sofia's cathedral in Kiev. XI century.
<bdi><a href="https://en.wikipedia.org/wiki/en:Fedor_Solntsev" class="extiw" title="w:en:Fedor Solntsev"><span title="Russian painter and historian (1801-1892)">Fedor Solntsev</span></a>
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This image is available from the <a href="//commons.wikimedia.org/wiki/New_York_Public_Library" title="New York Public Library">New York Public Library</a>'s Digital Library under the digital ID 1590662: <a rel="nofollow" class="external text" href="http://digitalgallery.nypl.org/nypldigital/id?1590662">digitalgallery.nypl.org</a> → <a rel="nofollow" class="external text" href="https://digitalcollections.nypl.org/search/index?keywords=1590662">digitalcollections.nypl.org</a>