Columbia subject headings:
Harvard subject headings:
Architecture--Italy--Milan--19th century.
Piazza Mercanti (Milan, Italy)--Exhibitions.
Plazas--Italy--Milan--Exhibitions.
Princeton subject headings:
Architecture--Italy--Milan--Conservation and restoration--Exhibitions.
Milan (Italy)--Buildings, structures, etc.--Exhibitions.
Piazza dei Mercanti (Milan, Italy)--Exhibitions.