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