Columbia subject headings:
Harvard subject headings:
Charles V, Holy Roman Emperor, 1500-1558
Isabel, Empress, consort of Charles V, Holy Roman Emperor, 1503-1539
Spain--History--Charles I, 1516-1556
Princeton subject headings:
Isabel, Empress, consort of Charles V, 1503-1539.
Queens--Spain--Biography.
Spain--History--Charles I, 1516-1556.