<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 1837-1839
<a rel="nofollow" class="external text" href="https://www.nga.gov/collection/art-object-page.74798.html">National Gallery of Art, Washington, D. C., online collection</a>