A mural <i>Whoever does not condemn – consents</i> commemorating Polish diplomat <a href="https://en.wikipedia.org/wiki/Jan_Karski" class="extiw" title="w:Jan Karski">Jan Karski</a> who tried to alert the Western Allies about atrocities of the Holocaust and other crimes in German occupied Poland at 30/32 Lubelska Street in Warsaw.
<a href="//commons.wikimedia.org/wiki/User:Boston9" title="User:Boston9">Adrian Grycuk (photo)</a>
CC BY-SA 3.0 pl
<span class="int-own-work">Self-photographed</span>