Columbia subject headings:
Archaeology, Medieval--Congresses.
Architecture, Medieval--Congresses.
Church architecture--Europe--History--To 1500--Congresses.
Collegiate churches--Europe--History--Congresses.
Europe--History, Local--Congresses.
Harvard subject headings:
Archaeology, Medieval--Congresses.
Architecture, Medieval--Congresses
Church architecture--Europe--History--To 1500--Congresses.
Collegiate churches--Europe--History--Congresses.
Europe--History, Local--Congresses.
Princeton subject headings: