Columbia subject headings:
Architecture, Medieval--Congresses.
Art, Medieval--Congresses.
Church architecture--Europe--Congresses.
Cities and towns, Medieval--Congresses.
Palaces--History--To 1500--Congresses.
Harvard subject headings:
Architecture, Medieval--Congresses
Art, Medieval--Congresses
Church architecture--Europe--Congresses.
Cities and towns, Medieval--Congresses
Palaces--History--To 1500--Congresses.
Princeton subject headings:
Architecture, Medieval--Congresses.
Art, Medieval--Congresses.
Church architecture--Europe--Congresses.
Cities and towns, Medieval--Congresses.
Palaces--History--To 1500--Congresses.