Columbia subject headings:
Berlin (Germany)--Description and travel.
Berlin (Germany)--Pictorial works.
Historic buildings--Germany--Berlin.
Rückwardt, Hermann Oskar, 1845-1919.
Harvard subject headings:
Berlin (Germany)--Description and travel
Berlin (Germany)--Pictorial works
Historic buildings--Germany--Berlin.
Rückwardt, Hermann Oskar, 1845-1919.
Princeton subject headings:
Architecture--Germany--Berlin--Pictorial works.
Berlin (Germany)--Buildings, structures, etc.--Pictorial works.
Historic buildings--Germany--Berlin--Pictorial works.
Rückwardt, Hermann Oskar, 1845-1919.