Columbia subject headings:
Excavations (Archaeology)--Italy--Gubbio.
Excavations (Archaeology)--Italy--Ingino Mountain.
Gubbio (Italy)--Antiquities.
Ingino Mountain (Italy)--Antiquities.
Italy--Antiquities.
Harvard subject headings:
Archaeology, Medieval.
Excavations (Archaeology)--Italy--Gubbio.
Fortification--Italy--Gubbio.
Gubbio (Italy)--Antiquities.
Princeton subject headings: