Columbia subject headings:
Diocletian, Emperor of Rome, 245-313.
Rome--History--Constantines, 306-363.
Rome--History--Diocletian, 284-305.
Harvard subject headings:
Diocletian, Emperor of Rome, 245-313
Emperors--Rome--Biography
Rome--History--Constantines, 306-363.
Rome--History--Diocletian, 284-305
Princeton subject headings:
Diocletian, Emperor of Rome, 245-313.
Rome--History--Constantines, 306-363.
Rome--History--Diocletian, 284-305.