Columbia subject headings:
Cities and towns, Medieval--Italy--Veneto--Congresses.
City walls--Italy--Veneto--Congresses.
Fortification--Italy--Veneto--Congresses.
Harvard subject headings:
Cities and towns, Medieval--Italy--Veneto.
City planning--Italy--Veneto--History.
City walls--Italy--Veneto.
Fortification--Italy--Veneto.
Princeton subject headings:
Cities and towns, Medieval--Italy--Veneto.
City walls--Italy--Veneto.
Fortification--Italy--Veneto.