• 2 Music Library (Mills)

• 5 DVDs

• 9 Production and direction
• 5 Operas
• 4 Ring des Nibelungen
• 3 Verdi, Giuseppe, 1813-1901
• 2 Bayreuther Festspiele
• 2 Composers
• 2 Criticism and interpretation
• 2 History
• 2 Parsifal
• 1 Antisemitism
• 1 History and criticism
• 1 Meistersinger von Nürnberg
• 1 Moral and ethical aspects
• 1 Music
• 1 Music and antisemitism
• 1 National socialism and music
• 1 Performances
• 1 Relations with women
• 1 Rienzi
• 1 Singing
• 1 Tannhäuser
• 1 Wagner, Katharina, 1978-
• 1 Women in opera

• 5 Wagner, Richard, 1813-1883
• 3 Makido Film
• 3 Monarda Arts (Firm)
• 2 Fox, Tom, 1950-
• 2 Lehnhoff, Nikolaus
• 2 Meier, Waltraud
• 2 Moritz, Reiner E.
• 2 Nylund, Camilla
• 2 Salminen, Matti
• 2 Unitel Film- und Fernsehproduktionsgesellschaft mbH
• 1 Academy Media (Firm)
• 1 Aldrich, Kate
• 1 Arthaus Musik (Firm)
• 1 BBC Films
• 1 Barenboim, Daniel, 1942-
• 1 Bayreuther Festspiele
• 1 Bayreuther Festspiele. performer
• 1 Bernhard Fleischer Moving Images (Firm)
• 1 Betz, Martin
• 1 Bieber, Clemens
• 1 Bjarni Thor Kristinsson
• 1 Bock, Hans Christoph von
• 1 Boekelheide, Jay
• 1 Bronk, Stephen
• 1 Burton, Humphrey, 1931-

• 13 English
• 7 German

• 6 Germany
• 2 Italy
• 1 Bayreuth

Limit year range