The distinctive emblem for cultural property to mark "movable or immovable property of great importance to the cultural heritage of every people" during an armed conflict; defined in the Hague Convention "for the Protection of Cultural Property in the Event of Armed Conflict" (May 14, 1954);
based on:

Rozporządzenie Ministra Kultury z dnia 9 lutego 2004 r. (Dz.U. 2004 nr 30 poz. 259)
cropped from File:Obiekt zabytkowy znak.svg
Jan Zachwatowicz (Poland)