Columbia subject headings:
Harvard subject headings:
Cities and towns, Medieval
Cities and towns, Medieval--Europe--Congresses.
City planning--Europe--History--To 1500--Congresses.
Metropolitan areas--Europe--History--To 1500--Congresses.
Sociology, Urban--Europe--History--To 1500--Congresses.
Urbanization--Europe--History--To 1500--Congresses.
Urbanization--History
Princeton subject headings:
Cities and towns, Medieval.
Urbanization--History.