<i>Clasp for liturgical vestments</i> (copper sheet, stones, enamel, gilding).
Unknown (Italy); author of photo unknown
<p>"Catalogue of stolen and missing cultural achievements" / comp. Jan Świeczyński; Ośrodek Informacyjno-Koordynacyjny Ochrony Obiektów Muzealnych. Warsaw 1988 Editor: Wojciech Jaskulski, Piotr Ogrodzki. 
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See also <a rel="nofollow" class="external text" href="http://www.mkidn.gov.pl/kolekcje/">Department of National Heritage, Wartime losses</a> (an official webpage of Polish Ministry of Culture, Art and National Heritage)