Columbia subject headings:
Rome--History--Empire, 30 B.C.-476 A.D.
Rome--History--Republic, 265-30 B.C.
Harvard subject headings:
Rome--History--Empire, 30 B.C.-476 A.D.
Rome--History--Republic, 265 B.C.-30 B.C.
Princeton subject headings:
Rome--History--Empire, 30 B.C.-476 A.D.
Rome--History--Republic, 265-30 B.C.