<bdi><a href="https://en.wikipedia.org/wiki/en:Ludwig_Knaus" class="extiw" title="w:en:Ludwig Knaus"><span title="German artist (1829–1910)">Ludwig Knaus</span></a>
</bdi>
circa 1851 <div style="display: none;">date QS:P571,+1851-52-00T00:00:00Z/10,P1480,Q5727902</div>
<a rel="nofollow" class="external text" href="https://www.lempertz.com/de/kataloge/lot/1057-1/1639-ludwig-knaus.html">Kunsthaus Lempertz, 14.11.2015, lot 1639</a>