Columbia subject headings:
Harvard subject headings:
Cities and towns, Medieval--Europe, Central--Congresses.
Elite (Social sciences)--Europe, Central--Congresses.
Nobility--Europe, Central--Congresses.
Princeton subject headings:
Cities and towns, Medieval--Europe, Central--Congresses.
Elite (Social sciences)--Europe, Central--Congresses.
Nobility--Europe, Central--Congresses.