Columbia subject headings:
Music--Germany--19th century--History and criticism.
Musical theater--Germany--History--19th century.
Teutonic Knights--History.
Theater--Germany--History--19th century.
Harvard subject headings:
Music--Germany--19th century--History and criticism
Musical theater--Germany--History--19th century.
Teutonic Knights--History.
Theater--Germany--History--19th century.
Princeton subject headings:
Music--Germany--19th century--History and criticism.
Musical theater--Germany--History--19th century.
Teutonic Knights--History.
Theater--Germany--History--19th century.