Columbia subject headings:
Arcades (Architecture)--Italy--Piedmont.
Piedmont (Italy)--Buildings, structures, etc.
Porticoes--Italy--Piedmont.
Harvard subject headings:
Piedmont (Italy)--Buildings, structures, etc.--History.
Plazas--Italy--Piedmont--History--19th century.
Porticoes--Italy--Piedmont--History--19th century.
Princeton subject headings:
Arcades (Architecture)--Italy--Piedmont.
Piedmont (Italy)--Buildings, structures, etc.
Porticoes--Italy--Piedmont.