Columbia subject headings:
Byzantine Empire--History--Heraclius, 610-641.
Byzantine Empire--Kings and rulers.
Emperors--Byzantine Empire--Biography.
Heraclius, Emperor of the East, approximately 575-641.
Harvard subject headings:
Byzantine Empire--History--Heraclius, 610-641
Byzantine Empire--Kings and rulers
Emperors--Byzantine Empire--Biography
Heraclius, Emperor of the East, approximately 575-641
Princeton subject headings:
Byzantine Empire--History--Heraclius, 610-641.
Byzantine Empire--Kings and rulers.
Emperors--Byzantine Empire--Biography.
Heraclius, Emperor of the East, approximately 575-641.