Columbia subject headings:
Charles V, Holy Roman Emperor, 1500-1558.
Spain--History--Charles I, 1516-1556.
Harvard subject headings:
Charles V, Holy Roman Emperor, 1500-1558.
Holy Roman Empire--History--1517-1648.
Spain--History--16th century.
Princeton subject headings:
Charles V, Holy Roman Emperor, 1500-1558.
Spain--History--Charles I, 1516-1556.