<div class="fn value">
Unknown painter (school of Cranach)</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), <a rel="nofollow" class="external text" href="https://pictures.royalsociety.org/image-rs-9669">royalsociety.org (18th-century copy)</a>