Columbia subject headings:
Charles V, Holy Roman Emperor, 1500-1558--Congresses.
Holy Roman Empire--History--Charles V, 1519-1556--Congresses.
Holy Roman Empire--Kings and rulers--Congresses.
Spain--History--Charles I, 1516-1556--Congresses.
Harvard subject headings:
Charles V, Holy Roman Emperor, 1500-1558--Congresses.
Holy Roman Empire--History--Charles V, 1519-1556--Congresses.
Princeton subject headings: