Columbia subject headings:
Harvard subject headings:
Community development, Urban--Europe--History--To 1500--Congresses.
Fairs--Europe--History--To 1500--Congresses.
Markets--Europe--History--To 1500--Congresses.
Princeton subject headings:
Community development, Urban--Europe--History--To 1500.
Fairs--Europe--History--To 1500.
Markets--Europe--History--To 1500.