Columbia subject headings:
Architecture, Industrial--Conservation and restoration--Germany--Essen.
Industrial buildings.
Mine buildings--Remodeling for other use--Germany--Essen.
Zollverein Mine (Germany)
Harvard subject headings:
Architecture, Industrial--Conservation and restoration--Germany--Essen.
Industrial buildings.
Mine buildings--Remodeling for other use--Germany--Essen.
Zollverein Mine (Germany)
Princeton subject headings: