Columbia subject headings:
Europe--Economic conditions--To 1492--Congresses.
Europe--Rural conditions--Congresses.
Europe--Social conditions--To 1492--Congresses.
Villages--Europe--Congresses.
Harvard subject headings:
Civilization, Medieval--Congresses
Europe--Economic conditions--To 1492--Congresses.
Europe--Rural conditions--Congresses.
Europe--Social conditions--To 1492--Congresses.
Middle Ages--Congresses
Villages--Europe--History--Congresses.
Princeton subject headings:
Europe--Economic conditions--To 1492--Congresses.
Europe--Rural conditions--Congresses.
Europe--Social conditions--To 1492--Congresses.
Villages--Europe--Congresses.