Columbia subject headings:
Constantine I, Emperor of Rome, -337.
Emperors--Rome--Biography.
Rome--History--Constantine I, the Great, 306-337.
Harvard subject headings:
Constantine I, Emperor of Rome, -337
Emperors--Rome--Biography
Rome--History--Constantine I, the Great, 306-337.
Princeton subject headings:
Constantine I, Emperor of Rome, -337.
Rome--History--Constantine I, the Great, 306-337.
Rome--Kings and rulers--Biography.