Columbia subject headings:
Mosaics, Roman--Italy--Ostia (Extinct city)
Pavements, Mosaic--Italy--Ostia (Extinct city)
Harvard subject headings:
Mosaics, Roman--Italy--Ostia (Extinct city)
Pavements, Mosaic--Italy--Ostia (Extinct city)
Princeton subject headings:
Mosaics, Roman--Italy--Ostia (Extinct city).
Pavements, Mosaic--Italy--Ostia (Extinct city).