Columbia subject headings:
Europe--Antiquities--Congresses.
Europe--History--392-814--Congresses.
Migrations of nations--Congresses.
Harvard subject headings:
Europe--Antiquities--Congresses.
Europe--History--392-814--Congresses.
Migrations of nations--Congresses.
Princeton subject headings:
Archaeology--Methodology.
Human geography--Europe--History.
Land settlement patterns--Europe--History.