Man with sledge hammer, Gerhard Janensch 1920
author <a href="//commons.wikimedia.org/wiki/Gerhard_Janensch" title="Gerhard Janensch">Gerhard Janensch</a> 1920, photo <a href="//commons.wikimedia.org/wiki/User:Jerzystrzelecki" title="User:Jerzystrzelecki">Jerzy Strzelecki</a>
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>