Columbia subject headings:
Germany--History--Henry VI, 1190-1197.
Henry VI, Holy Roman Emperor, 1165-1197.
Harvard subject headings:
Germany--History--Henry VI, 1190-1197.
Henry VI, Holy Roman Emperor, 1165-1197.
Princeton subject headings:
Germany--History--Henry VI, 1190-1197.
Henry VI, Holy Roman Emperor, 1165-1197.