Columbia subject headings:
Architecture, Roman--Italy--Tivoli.
Excavations (Archaeology)--Conservation and restoration--Italy--Tivoli.
Hadrian's Villa (Tivoli, Italy)
Tivoli (Italy)--Antiquities--Collection and preservation.
Harvard subject headings:
Architectural surveys--Italy--Tivoli.
Architecture, Roman--Italy--Tivoli--Designs and plans.
Hadrian's Villa (Tivoli, Italy)
Tivoli (Italy)--Antiquities, Roman.
Tivoli (Italy)--Buildings, structures, etc.
Princeton subject headings: