Columbia subject headings:
Constantine I, Emperor of Rome, -337.
Diocletian, Emperor of Rome, 245-313.
Rome--Politics and government--284-476.
Harvard subject headings:
Constantine I, Emperor of Rome, -337
Diocletian, Emperor of Rome, 245-313
Rome--Politics and government--284-476
Princeton subject headings:
Constantine I, Emperor of Rome, -337.
Diocletian, Emperor of Rome, 245-313.
Rome--Politics and government--284-476.