What is "jahrhundertring"

The Jahrhundertring (Centenary Ring) was the production of Richard Wagner's Ring Cycle, Der Ring des Nibelungen, at the Bayreuth Festival in 1976, celebrating the centenary of both the festival and the first performance of the complete cycle. The festival was directed by Wolfgang Wagner and the production was created by the French team of conductor Pierre Boulez, stage director Patrice Chéreau, stage designer Richard Peduzzi, costume designer Jacques Schmidt and lighting designer André Diot. The cycle was shown first in 1976, then in the following years until 1980. It was filmed for television in 1979 and 1980. While the first performance caused "a near-riot" for its brash modernity, the staging, termed the beginning of Regietheater (director's theater), established a standard for later productions.