An 1891 painting of the Heckmann coppermill by unknown artist, at the Deutsches Historisches Museum, Berlin.
In 1837, Carl Justus Heckmann (1786-1878) founded a copper mill at Schlesisches Tor, Berlin. Between 1840-1850, it was a leading company with numerous branches in the German Reich. In 1868, Heckmann retired from business and his sons continued the company. The painting was a gift to the foreman, C.W. Meyer, who can be seen on the right edge.
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Unknown artist<span style="display: none;">Unknown artist</span></div>
1891<div style="display: none;">date QS:P571,+1891-00-00T00:00:00Z/9</div>
<span class="int-own-work" lang="en">Own work</span> <a href="//commons.wikimedia.org/wiki/User:Illustratedjc" title="User:Illustratedjc">Illustratedjc</a>