Former „Duisburger Kupferhütte“ (german for: copper works; today: DK Recycling) in 1960. <a href="//commons.wikimedia.org/wiki/Duisburg" class="mw-redirect" title="Duisburg">Duisburg</a>, Germany.
<a href="//commons.wikimedia.org/wiki/User:Lienhard_Schulz/Photographs_by_Martin_Schulz" title="User:Lienhard Schulz/Photographs by Martin Schulz">Martin Schulz</a>, father of <a href="//commons.wikimedia.org/wiki/User:Lienhard_Schulz" title="User:Lienhard Schulz">Lienhard Schulz</a>
CC BY-SA 3.0
Photo album № 5 of Martin Schulz