Columbia subject headings:
Harvard subject headings:
Baths, Roman--Italy--Ostia (Extinct city)
Excavations (Archaeology)--Italy--Ostia (Extinct city)
Municipal water supply--Italy--Ostia (Extinct city)
Ostia (Extinct city)
Ostia (Extinct city)--Antiquities, Roman.
Public baths--Italy--Ostia (Extinct City)
Princeton subject headings:
Excavations (Archaeology)--Italy--Ostia (Extinct city).
Hydraulic structures--Italy--Ostia (Extinct city).
Ostia (Extinct city)--Buildings, structures, etc.
Ostia Region (Italy)--Antiquities, Roman.