Listed <a href="https://de.wikipedia.org/wiki/Fichtebunker" class="extiw" title="de:Fichtebunker">Fichtebunker</a> in the Fichtestreet, <a href="//commons.wikimedia.org/wiki/Berlin-Kreuzberg" title="Berlin-Kreuzberg">Berlin-Kreuzberg</a>. It’s the oldest conserved <a href="//commons.wikimedia.org/wiki/Gasometer" title="Gasometer">Stonegasometer</a> in Berlin. Built in 1874 by the civil engineer Johann Wilhelm Schwedler. In  WWII used as air-raid shelter.
<a href="//commons.wikimedia.org/wiki/User:Lienhard_Schulz" title="User:Lienhard Schulz">Lienhard Schulz</a>
CC BY 2.5
<span class="int-own-work" lang="en">Own work</span>