Columbia subject headings:
Archaeology, Medieval--Congresses.
Christian antiquities--Congresses.
Middle Ages--Congresses.
Rome--Antiquities--Congresses.
Harvard subject headings:
Archaeology, Medieval--Congresses
Christian antiquities--Congresses.
Middle Ages--Congresses
Rome--Antiquities--Congresses.
Princeton subject headings:
Archaeology, Medieval--Congresses.
Christian antiquities--Congresses.
Middle Ages--Congresses.
Rome--Antiquities--Congresses.