Columbia subject headings:
Agricultural laborers--Rome.
Europe--Antiquities, Roman.
Limes (Roman boundary)
Rome--Boundaries.
Slavery--Rome.
Harvard subject headings:
Rome--Boundaries.
Princeton subject headings:
Agricultural laborers--Rome.
Boundaries.
Europe--Antiquities, Roman.
Limes (Roman boundary)
Rome--Boundaries--History.
Slavery--Rome.