Columbia subject headings:
Cemeteries--Germany--Essen--History.
Sepulchral monuments--Conservation and restoration--Germany--Essen.
Sepulchral monuments--Germany--Essen--History.
Harvard subject headings:
Cemeteries--Germany--Essen--History.
Sepulchral monuments--Germany--Essen--Conservation and restoration.
Sepulchral monuments--Germany--Essen--History.
Princeton subject headings:
Cemeteries--Germany--Essen--History.
Sepulchral monuments--Germany--Essen--History.
Sepulchral monuments--Germany--essen--Conservation and restoration.