Columbia subject headings:
Architecture, Domestic--Germany--Rhineland.
Architecture, Domestic--Germany.
Architecture--Germany--History--19th century.
Architecture--Germany--Rhineland--History--19th century.
Mansions--Germany--Rhineland.
Mansions--Germany.
Harvard subject headings:
Architecture, Domestic--Germany--Conservation and restoration.
Architecture, Domestic--Germany--Rhineland.
Architecture, Modern--19th century--Germany--Conservation and restoration.
Dwellings--Germany
Dwellings--Germany--Rhineland.
Rhineland (Germany)--History--19th century.
Princeton subject headings:
Architecture, Domestic--Germany (West)--Rhineland.
Architecture, Domestic--Germany.
Architecture, Modern--19th century--Germany (West)--Rhineland.
Architecture, Modern--19th century--Germany.
Mansions--Germany (West)--Rhineland.
Mansions--Germany.