Columbia subject headings:
Cities and towns, Medieval--Europe--Congresses.
Cities and towns, Medieval--Historiography--Congresses.
Civilization, Medieval--Congresses.
Harvard subject headings:
Cities and towns, Medieval--Europe--Congresses.
Cities and towns, Medieval--Europe--History--Congresses.
Cities and towns, Medieval--Historiography--Congresses.
Civilization, Medieval--Congresses
Princeton subject headings:
Cities and towns, Medieval--Europe--History--Congresses.
Cities and towns, Medieval--Historiography--Congresses.
Civilization, Medieval--Congresses.