Columbia subject headings:
Byzantine Empire--History--Constans II, 641-668.
Constans II, Emperor of the East, 630-668.
Italy--History--476-774.
Harvard subject headings:
Byzantine Empire--History--Constans II, 641-668.
Constans II Pogonatus, Byzantine Emperor, 630-668.
Italy--History--476-774.
Princeton subject headings:
Byzantine Empire--History--Constans II, 641-668.
Italy--History--476-774.