For a couple of seasons she continued to sing in the Bayreuth productions that Wieland Wagner had created with her.

His design for the 1937 Bayreuth production of Parsifal, for example, was conservative, though it did have film projections during the transformation scenes.

The Bayreuth production of "Die Meistersinger," I am told, is just as forlorn.

Yet her son, Siegfried, began the modernization of Bayreuth productions (often at odds with written directions) as early as 1908.

Bayreuth productions have tended toward abstraction, particularly after Wieland Wagner's 1951 staging, which set the whole opera on an illuminated disk, (the torus's ancestor).

The sets for the Grail ceremony seem to imitate the original Bayreuth production.

Like many Bayreuth productions, this one has abstract sets.

Wieland continued to modify and refine his Bayreuth production of Parsifal until his death in 1966.

Cosima Wagner, his widow, oversaw the first Bayreuth production of Tristan in 1886, a production that was widely acclaimed.

The German Wikipedia entry lists all Bayreuth productions, their directors, set and costume designers.