Columbia subject headings:
Harvard subject headings:
Architecture, Domestic--Germany--Congresses.
Germany--History--To 1517--Congresses.
Holy Roman Empire--History--To 1517--Congresses.
Social interaction--Germany--History--Congresses.
Symbolic interactionism--Congresses.
Symbolism in architecture--Germany--Congresses.
Princeton subject headings:
Architecture, Domestic--Germany--Congresses.
Symbolism in architecture--Germany--Congresses.