Columbia subject headings:
Siena (Italy : Province)--Civilization.
Siena (Italy : Province)--History.
Harvard subject headings:
Art, Medieval--Italy--Siena.
Grosseto (Italy : Province)--Civilization.
Siena (Italy : Province)--Civilization.
Siena (Italy : Province)--History.
Princeton subject headings:
Siena (Italy)--History.
Siena (Italy)--Pictorial works.