Columbia subject headings:
Architecture, Medieval--Conservation and restoration--Italy--Siena.
Church architecture--Conservation and restoration--Italy--Siena.
Hospital buildings--Conservation and restoration--Italy--Siena.
Siena (Italy)--Buildings, structures, etc.--Conservation and restoration.
Spedale di Santa Maria della Scala (Siena, Italy)
Harvard subject headings:
Architecture, Medieval--Conservation and restoration--Italy--Siena.
Architecture, Medieval--Italy--Siena--Conservation and restoration.
Church architecture--Conservation and restoration--Italy--Siena.
Church architecture--Italy--Siena--Conservation and restoration.
Siena (Italy)--Buildings, structures, etc.--Conservation and restoration.
Spedale di Santa Maria della Scala (Siena, Italy)
Princeton subject headings:
Architecture, Medieval--Italy--Siena--Conservation and restoration.
Church architecture--Italy--Siena--Conservation and restoration.
Siena (Italy)--Buildings, structures, etc.--Conservation and restoration.
Spedale di Santa Maria della Scala (Siena, Italy)