Columbia subject headings:
Harvard subject headings:
Gallienus, Publius Licinius Egnatius, Emperor of Rome, 233?-268
Rome--Politics and government--30 B.C.-284 A.D.
Princeton subject headings:
Gallienus, Publius Licinius Egnatius, Emperor of Rome, 233?-268.
Rome--Politics and government--30 B.C.-284 A.D.