<bdi><a href="https://en.wikipedia.org/wiki/en:Caspar_David_Friedrich" class="extiw" title="w:en:Caspar David Friedrich"><span title="German painter">Caspar David Friedrich</span></a>
</bdi>
1807<div style="display: none;">date QS:P571,+1807-00-00T00:00:00Z/9</div>
<a rel="nofollow" class="external text" href="http://www.sothebys.com/de/auctions/ecatalogue/2018/19th-century-european-ptgs-l18102/lot.8.html">Sotheby's, London (not for sale, only as a reference)</a>