<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 1850 <div style="display: none;">date QS:P571,+1850-00-00T00:00:00Z/9,P1480,Q5727902</div>
<a rel="nofollow" class="external text" href="http://www.arcadja.com/auctions/de/private/knaus_ludwig/kunstwerken/15533/0/">Heritage Auctions, Dallas,  06 December 2007  lot 23062 via ARCADJA auction results</a>