<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>
1880<div style="display: none;">date QS:P571,+1880-00-00T00:00:00Z/9</div>
<a rel="nofollow" class="external text" href="http://www.sothebys.com/content/sothebys/de/auctions/ecatalogue/2016/19th-century-european-art-n09499/lot.78.html">Sotheby's, New York, 18 Mai 2016, lot 78</a>