Columbia subject headings:
Harvard subject headings:
Bayreuther Festspiele.
Opera producers and directors--Germany--Bayreuth--Biography.
Wagner family.
Wagner, Cosima, 1837-1930.
Wagner, Richard, 1813-1883
Princeton subject headings:
Bayreuther Festspiele--History.
Composers' spouses--Germany--Biography.
Opera producers and directors--Germany--Bayreuth--Biography.
Wagner, Cosima, 1837-1930.