Columbia subject headings:
Praefectus praetorio.
Rome--Politics and government--30 B.C.-476 A.D.
Harvard subject headings:
Praefectus praetorio.
Rome--Politics and government--30 B.C.-476 A.D.
Princeton subject headings:
Praefectus praetorio.
Rome--Politics and government--30 B.C.-476 A.D.