Gravesite at <a href="//commons.wikimedia.org/wiki/Friedhof_Columbiadamm" title="Friedhof Columbiadamm">Friedhof Columbiadamm</a> for the 28 victims of the <a href="https://de.wikipedia.org/wiki/LZ_18" class="extiw" title="de:LZ 18">de:LZ 18</a> (L 2) crash in 1913 at the first German <a href="https://de.wikipedia.org/wiki/Flugplatz_Johannisthal" class="extiw" title="de:Flugplatz Johannisthal">Airport Berlin-Johannisthal</a>. The anchor means, that this  <a href="//commons.wikimedia.org/wiki/Zeppelin" title="Zeppelin">Zeppelin</a> was a <i>Marineluftschiff</i> (navy zeppelin)
<a href="//commons.wikimedia.org/wiki/User:Mutter_Erde" title="User:Mutter Erde">Mutter Erde</a>
Attribution
<span class="int-own-work" lang="en">Own work</span>