Columbia subject headings:
Canals--Italy--Venice--History.
Venice (Italy)--Description and travel.
Venice (Italy)--History.
Harvard subject headings:
Canals--Italy--Venice--History--Maintenance and repair.
Canals--Italy--Venice--History.
Canals--Italy--Venice--Pictorial works.
City planning--Italy--Venice
Streets--Italy--Venice.
Venice (Italy)--Buildings, structures, etc.
Venice (Italy)--History.
Princeton subject headings:
Canals--Italy--Venice--History.
Canals--Italy--Venice--Pictorial works.
Venice (Italy)--History.