mostly opera: Barenboim Kupfer Bayreuth Nibelungen Ring on DVD
Kupfer/Barenboim Ring – 1. Das Rheingold | operaramblings
Bayreuther Festspiele 1991/1992: Der Ring des Nibelungen - Siegfried | Livestream | BR-KLASSIK | Bayerischer Rundfunk
Why Barenboim is the Ring master of our age | Opera | The Guardian
Wagner: Der Ring Des Nibelungen Blu-ray
mostly opera: Barenboim Kupfer Bayreuth Nibelungen Ring on DVD
Die Walküre | Wagneropera.net
Der Ring des Nibelungen | Wagneropera.net
Kupfer/Barenboim Ring – 1. Das Rheingold | operaramblings
Harry Kupfer obituary | Opera | The Guardian
Der Ring des Nibelungen at the Bayreuth Festival - all the productions | Wagneropera.net
Amazon.com: Wagner: Der Ring des Nibelungen : Bayreuth Festival, Siegfried Jerusalem, John Tomlinson, Anne Evans, Daniel Barenboim, Harry Kupfer, Richard Wagner: Movies & TV
The Bayreuth Festival | Live streams and concerts
Review: A New 'Ring' at Bayreuth Does Wagner Without Magic - The New York Times
Review: A New 'Ring' at Bayreuth Does Wagner Without Magic - The New York Times
Amazon.com: Wagner: Der Ring des Nibelungen : Bayreuth Festival, Siegfried Jerusalem, John Tomlinson, Anne Evans, Daniel Barenboim, Harry Kupfer, Richard Wagner: Movies & TV
Introduction to Wagner, Der Ring des Nibelungen
Bayreuth's new Ring doesn't come full circle | The New Criterion
Review: A New 'Ring' at Bayreuth Does Wagner Without Magic - The New York Times
Review | New Bayreuth Festival Ring Cycle — A Stew of Undercooked Ideas
