Columbia subject headings:
Coins--Rome--History--Sources.
Rome--Army--History--Sources.
Rome--Army--Officers--History--Sources.
Harvard subject headings:
Coins, Roman.
Emperors--Rome--Portraits
Rome--Army--History.
Rome--Foreign relations.
Rome--Religion.
Princeton subject headings:
Coins, Roman.
Emperors--Rome--Portraits.
Portraits.
Rome--Army--History.
Rome--Foreign relations.
Rome--Religion.