Columbia subject headings:
Berlin (Germany)--Buildings, structures, etc.--Exhibitions.
Buildings--War damage--Germany--Berlin--Exhibitions.
Palaces--Conservation and restoration--Germany--Berlin--Exhibitions.
Schloss Charlottenburg.
Harvard subject headings:
Berlin (Germany)--Buildings, structures, etc.--Exhibitions.
Palaces--Germany--Berlin--Conservation and restoration--Exhibitions.
Schloss Charlottenburg--Exhibitions.
Princeton subject headings: