Columbia subject headings:
Archaeology, Medieval--Europe--Congresses.
Europe--Antiquities--Congresses.
Middle Ages--Europe--Congresses.
Harvard subject headings:
Archaeology, Medieval--Europe--Congresses.
Europe--Antiquities--Congresses.
Excavations (Archaeology)--Europe--Congresses
Middle Ages--Congresses
Middle Ages--Europe--Congresses.
Princeton subject headings: