Burned-out <a href="https://en.wikipedia.org/wiki/Royal_Castle,_Warsaw" class="extiw" title="w:Royal Castle, Warsaw">Royal Castle in Warsaw</a>. Photo taken after the Castle was burned by <a href="https://en.wikipedia.org/wiki/Nazis" class="extiw" title="w:Nazis">Nazis</a> in September 1939 but before <a href="https://en.wikipedia.org/wiki/Warsaw_Uprising" class="extiw" title="w:Warsaw Uprising">Warsaw Uprising</a> in August 1944 when the Castle were totally destroved.
Unknown author<span style="display: none;">Unknown author</span>
1940
<cite class="book" style="font-style:normal">Jerzy Piorkowski (1957)      <i> Miasto Nieujarzmione</i>, <a href="https://en.wikipedia.org/wiki/en:Warsaw" class="extiw" title="w:en:Warsaw"><span title="capital and largest city of Poland">Warsaw</span></a>:  Iskry, pp. ?  <small>no ISBN</small></cite>