Columbia subject headings:
Bell towers--Conservation and restoration--Italy--Modena.
Modena (Italy)--Buildings, structures, etc.
Torre Ghirlandina (Modena, Italy)
Harvard subject headings:
Bell towers--Conservation and restoration--Italy--Modena.
Modena (Italy)--Buildings, structures, etc.--Conservation and restoration.
Torre Ghirlandina (Modena, Italy)
Princeton subject headings:
Modena (Italy)--Buildings, structures, etc.
Torre Ghirlandina (Modena, Italy)
Towers--Italy--Modena--Conservation and restoration.