Columbia subject headings:
Harvard subject headings:
Excavations (Archaeology)--Italy--Grosseto.
Fortification--Italy--Grosseto--History.
Grosseto (Italy)--Antiquities.
Grosseto (Italy)--History.
Princeton subject headings:
Excavations (Archaeology)--Italy--Grosseto.
Fortezza di Grosseto (Grosseto, Italy)
Grosseto (Italy)--Antiquities.
Italy--Antiquities.
Military architecture--Italy--Grosseto.