Columbia subject headings:
Harvard subject headings:
Architecture--Italy--Milan
Art, Italian--Italy--Milan.
Gates--Italy--Milan.
Milan (Italy)--Buildings, structures, etc.
Milan (Italy)--Description and travel
Milan (Italy)--History
Princeton subject headings:
Architecture--Italy--Milan.
Art, Italian--Italy--Milan.
Gates--Italy--Milan.
Milan (Italy)--Buildings, structures, etc.
Milan (Italy)--Description and travel.
Milan (Italy)--History.