<bdi>Circle of <a href="https://en.wikipedia.org/wiki/en:Carl_Blechen" class="extiw" title="w:en:Carl Blechen"><span title="German painter (1798-1840)">Carl Blechen</span></a>
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<a rel="nofollow" class="external text" href="https://www.kollerauktionen.ch/de/328279-0001-1182-BLECHEN_-CARL_-UMKREIS-Bachlau-1182_442108.html?RecPos=41">Koller Auktionen, Zürich, 22. September 2017, Lot 3481</a>