Columbia subject headings:
Rome--History--Empire, 30 B.C.-284 A.D.
Harvard subject headings:
Rome--History--Empire, 30 B.C.-284 A.D.
Princeton subject headings:
Coins, Roman.
Gallienus, Publius Licinius Egnatius, Emperor of Rome, 233?-268.
Rome--History--Empire, 30 B.C.-284 A.D.