Columbia subject headings:
Harvard subject headings:
Cities and towns, Medieval--Europe--History--Congresses.
Urban geography--Europe--History--475-1492--Congresses.
Urban geography--Europe--History--475-l492--Congresses.
Princeton subject headings:
Cities and towns, Medieval--Congresses.
Cities and towns--Europe--History--To 1500--Congresses.
Civilization, Medieval--Congresses.