Columbia subject headings:
Harvard subject headings:
Archaeology, Medieval--Italy--Siena--Congresses.
Art, Italian--Italy--Siena--Congresses.
Hospitals--Italy--Siena--History--Congresses.
Siena (Italy)--Buildings, structures, etc.--Congresses.
Spedale di Santa Maria della Scala (Siena, Italy)
Spedale di Santa Maria della Scala (Siena, Italy)--Congresses.
Princeton subject headings:
Art--Italy--Siena--Congresses.
Hospitals--Italy--Siena--History--Congresses.
Siena (Italy)--Buildings, structures, etc.--Congresses.
Spedale di Santa Maria della Scala (Siena, Italy)--History--Congresses.