Memorial stone to <a href="https://en.wikipedia.org/wiki/Katyn_massacre" class="extiw" title="en:Katyn massacre">Katyn massacre</a> and <a href="https://en.wikipedia.org/wiki/2010_Polish_Air_Force_Tu-154_crash" class="extiw" title="en:2010 Polish Air Force Tu-154 crash">2010 Polish Air Force Tu-154 crash</a> in <a href="https://de.wikipedia.org/wiki/Gardekirche" class="extiw" title="de:Gardekirche">Gardekirche</a>.
Dctrzl
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>