Columbia subject headings:
Markets--Italy--Ostia (Extinct city)
Merchants--Italy--Ostia (Extinct city)
Ostia (Extinct city)
Ostia (Extinct city)--Buildings, structures, etc.
Ostia (Extinct city)--Economic conditions.
Ostia (Extinct city)--Social life and customs.
Port cities--Italy--Ostia (Extinct city)
Stores, Retail--Italy--Ostia (Extinct city)
Urbanization--Italy--Ostia (Extinct city)
Harvard subject headings:
Markets--Italy--Ostia (Extinct city)
Merchants--Italy--Ostia (Extinct city)
Ostia (Extinct city)
Ostia (Extinct city)--Buildings, structures, etc.
Ostia (Extinct city)--Economic conditions.
Ostia (Extinct city)--Social life and customs.
Port cities--Italy--Ostia (Extinct city)
Stores, Retail--Italy--Ostia (Extinct city)
Urbanization--Italy--Ostia (Extinct city)
Princeton subject headings:
Commercial buildings--Italy--Ostia.
Ostia (Italy)--Antiquities.
Retail trade--Italy--Ostia.