Columbia subject headings:
Hadrian's Villa (Tivoli, Italy)--Stadium.
Hadrian, Emperor of Rome, 76-138--Homes and haunts--Italy--Tivoli.
Palaces--Italy--Tivoli.
Harvard subject headings:
Architecture, Roman--Italy--Tivoli.
Gardens--Italy--Tivoli.
Princeton subject headings:
Hadrian's Villa (Tivoli, Italy)--Stadium.
Hadrian, Emperor of Rome, 76-138--Homes--Italy--Tivoli.
Tivoli (Italy)--Buildings, structures, etc.