Columbia subject headings:
Architecture, Roman--Conservation and restoration--Italy--Milan.
Church architecture--Conservation and restoration--Italy--Milan.
Milan (Italy)--Buildings, structures, etc.
Monastero maggiore (Milan, Italy)
Towers--Conservation and restoration--Italy--Milan.
Harvard subject headings:
Architecture, Roman--Conservation and restoration--Italy--Milan.
Church architecture--Conservation and restoration--Italy--Milan.
Milan (Italy)--Buildings, structures, etc.
Monastero maggiore (Milan, Italy)
Towers--Conservation and restoration--Italy--Milan.
Princeton subject headings:
Architecture, Roman--Conservation and restoration--Italy--Milan.
Church architecture--Conservation and restoration--Italy--Milan.
Milan (Italy)--Buildings, structures, etc.
Monastero maggiore (Milan, Italy)
Towers--Conservation and restoration--Italy--Milan.