Columbia subject headings:
City walls--Italy--Veneto--History.
Veneto (Italy)--History, Local.
Harvard subject headings:
City planning--Italy--Veneto.
City walls--Italy--Veneto--History.
City walls--Italy--Veneto.
Fortification--Italy--Veneto.
Veneto (Italy)--History, Local.
Veneto (Italy)--Pictorial works.
Princeton subject headings:
City walls--Italy--Veneto--History.
Veneto (Italy)--History, Local.