<div class="fn value">
<span lang="en">Anonymous</span><span style="display:none">Unknown author</span></div>
circa 1571 <div style="display: none;">date QS:P571,+1571-00-00T00:00:00Z/9,P1480,Q5727902</div>
<p>"Catalogue of paintings removed from Poland by the German occupation authorities during the years 1939-1945. 1, Foreign paintings" / comp. Władysław Tomkiewicz ; Ministry of Culture and Art. Warsaw 1950 Editor: Ministry of Culture and Art. 
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See also <a rel="nofollow" class="external text" href="http://kolekcje.mkidn.gov.pl/">Department of National Heritage, Wartime losses</a> (an official webpage of Polish Ministry of Culture, Art and National Heritage)