<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>
circa 1798/99
1. <a rel="nofollow" class="external text" href="http://www.arcadja.com/auctions/de/friedrich_caspar_david/kunstler/10425/">Kunsthaus Lempertz, 15 May 2010, Auktion 957, Lot 1878 via ARCADJA auction results</a><br>2. <a rel="nofollow" class="external text" href="https://www.lempertz.com/de/kataloge/lot/957-1/1878-caspar-david-friedrich.html">Kunsthaus Lempertz, Köln, Auktion 957, Alte Kunst, 15.05.2010, Lot 1878</a>