Hans Böckler (1875-1951), German politician and chairman of  <a href="https://en.wikipedia.org/wiki/German_Confederation_of_Trade_Unions" class="extiw" title="en:German Confederation of Trade Unions">German Confederation of Trade Unions</a> (<i>Deutscher Gewerkschaftsbund</i>, DGB). Bust in Berlin-Kreuzberg at <a href="//commons.wikimedia.org/wiki/Landwehrkanal" title="Landwehrkanal">Landwehrkanal</a> created by Karl Trumpf (1891-1959), date unknown, but after 1945.
<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>