Columbia subject headings:
Harvard subject headings:
Archaeology, Medieval--Italy--Poggibonsi.
Excavations (Archaeology)--Italy--Poggibonsi.
Poggibonsi (Italy)--Antiquities.
Princeton subject headings:
Archaeology, Medieval--Italy--Poggio Imperiale Site (Siena).
Church architecture--Italy--Elsa River Valley.
Excavations (Archaeology)--Italy--Poggio Imperiale Site (Siena)
Fortification--Italy--Poggio Imperiale Site (Siena).
Poggibonsi Region (Italy)--Antiquities.
Poggio Imperiale Site (Siena, Italy)