Columbia subject headings:
Architecture, Medieval--Italy--Siena.
Church architecture--Italy--Siena.
Excavations (Archaeology)--Italy--Siena.
Siena (Italy)--Buildings, structures, etc.
Harvard subject headings:
Archaeology, Medieval--Italy--Siena.
Architecture, Medieval--Italy--Siena.
Siena (Italy)--Buildings, structures, etc.
Spedale di Santa Maria della Scala (Siena, Italy)
Princeton subject headings:
Architecture, Medieval--Italy--Siena.
Church architecture--Italy--Siena.
Hospitals--Italy--Siena.
Siena (Italy)--Buildings, structures, etc.
Spedale di Santa Maria della Scala (Siena, Italy)