Columbia subject headings:
Beltrami, L. (Luca), 1854-1933--Criticism and interpretation--Exhibitions.
Castello sforzesco--Exhibitions.
Castles--Conservation and restoration--Italy--Milan--Exhibitions.
Milan (Italy)--Buildings, structures, etc.--Exhibitions.
Harvard subject headings:
Art--Collectors and collecting--Italy--Milan--History--Exhibitions.
Beltrami, L. (Luca), 1854-1933--Exhibitions.
Castello sforzesco--History--Exhibitions.
Castles--Conservation and restoration--Italy--Milan--Exhibitions.
Milan (Italy)--Buildings, structures, etc.--Exhibitions.
Princeton subject headings:
Beltrami, L. (Luca), 1854-1933--Criticism and interpretation--Exhibitions.
Castello sforzesco--Exhibitions.
Castles--Conservation and restoration--Italy--Milan--Exhibitions.
Milan (Italy)--Buildings, structures, etc--Exhibitions.