• 2 Music Library (Mills)

• 9 Videos, Slides, Films

• 4 Wagner, Richard, 1813-1883
• 1 Anniversaries, etc
• 1 Boccanegra, Simone, -1363
• 1 Donizetti, Gaetano, 1797-1848
• 1 Elisir d'amore
• 1 Levine, James, 1943-2021
• 1 Operas
• 1 Ring des Nibelungen. Götterdämmerung
• 1 Ring des Nibelungen. Rheingold
• 1 Ring des Nibelungen. Siegfried
• 1 Ring des Nibelungen. Walküre

• 8 Deutsche Grammophon (Firm)
• 8 Metropolitan Opera (New York, N.Y.)
• 6 Large, Brian
• 6 Metropolitan Opera (New York, N.Y.). Orchestra
• 4 Channel Four (Great Britain)
• 4 SEPT (Television station : France)
• 4 Schenk, Otto
• 4 Universal Music (Firm)
• 4 Wagner, Richard, 1813-1883
• 4 Österreichischer Rundfunk
• 3 Behrens, Hildegard
• 3 Jerusalem, Siegfried
• 3 Ludwig, Christa
• 3 Metropolitan Opera (New York, N.Y.). Chorus
• 3 Morris, James, 1947-
• 3 Salminen, Matti
• 3 Wlaschiha, Ekkehard
• 3 Zednik, Heinz
• 2 Battle, Kathleen
• 2 Briccetti, Louisa
• 2 Domingo, Plácido, 1941-
• 2 Fleming, Renée
• 2 Moll, Kurt, 1938-2017

• 6 German
• 4 Italian
• 1 English
• 1 French
• 1 Russian

• 8 Operas
• 5 Televised performances
• 5 Television adaptations
• 4 Nonfiction television programs
• 1 Drama
• 1 Excerpts
• 1 Music videos
• 1 Opera films
• 1 Television musicals

Limit year range