Columbia subject headings:
Cities and towns, Medieval--Italy--Congresses.
Italy--Description and travel--Early works to 1800.
Travelers--Italy--Congresses.
Visitors, Foreign--Italy--Congresses.
Harvard subject headings:
Cities and towns, Medieval--Italy--Congresses.
Travelers--Italy--Congresses.
Travelers--Italy--History--Congresses.
Visitors, Foreign--Italy--History--Congresses.
Princeton subject headings:
Cities and towns, Medieval--Italy--Congresses.
Italy--Description and travel.
Travelers--Italy--Congresses.
Visitors, Foreign--Italy--Congresses.