Much is at stake when the curtain rises on a new production of Richard Wagner's opera "Tristan and Isolde" Saturday, the glittering opening night of the legendary Bayreuth Festival.
The stakes are particularly high for the festival chief, Wagner's great-granddaughter Katharina Wagner, who is directing this year's staging.
The 37-year-old has been at the helm of the month-long summer music festival dedicated exclusively to Wagner's works alongside her much older half-sister Eva Wagner-Pasquier since 2009.
But Eva, 70, is stepping down at the end of the summer, leaving Katharina in sole charge, at least until her current contract expires in 2020.
In directorial terms, the list of works Katharina has staged is still comparatively short.
And she has only once before directed in Bayreuth's Festspielhaus -- the opera house built to her great-grandfather's own designs -- with "The Mastersingers of Nuremberg", a production that was almost universally loathed by audiences and critics alike.
Classical music aficionados suggest Bayreuth, more generally, could be losing some of its veneer. And Katharina's critics lay the blame squarely at her door.
Under her leadership, the festival's aesthetic preferences have veered towards confrontational directors, such as the self-styled "enfant terrible" of German theatre, Frank Castorf, whose current production of the sprawling four-opera "Ring" cycle has met with deafening waves of boos and whistles since it premiered in 2013.
Dyed-in-the-wool Wagnerians tend to be deeply conservative in their operatic tastes, and seasoned Bayreuthers say they are feeling increasingly alienated by the provocative, in-your-face productions.
- Internecine battles -
Music lovers also complain that to hear the best Wagner singers, they no longer need to head to Bayreuth, but can opt for the world's other leading opera houses.
The waiting list for tickets -- which used to stretch to 10 years and longer -- has shortened noticeably, not least because the Internet age has dawned over Bayreuth's mythical Green Hill, with a sizeable contingent of tickets now made available online.
Ever since the festival's beginnings in 1876, the composer's descendants have torn each other apart in bitter feuds for control of Bayreuth, whose guests traditionally include royalty and the political and social elite of the day.
Adolf Hitler was a fervent Wagnerian and regularly attended the festival. In peace-time Germany, many heads of government and state have come, and Chancellor Angela Merkel is this year again set to attend the opening night.
At times, the internecine battles of the different branches of the Wagner family have threatened to overshadow the on-stage theatrics. And this year has been no different.
Media reports -- vigorously dismissed -- have claimed that Katharina colluded with conductor Christian Thielemann to have Eva barred from the Green Hill once rehearsals for "Tristan" had started.
More oil was poured on the fire when the current "Ring" conductor, the intensely media-shy Russian Kirill Petrenko, publicly lambasted the way one of his singers -- Canadian tenor Lance Ryan, who sang the role of Siegfried in the past two years -- was replaced at short notice.
- Bitter rivalry -
Speculation of bitter rivalry between Petrenko and Thielemann reached fever pitch when Petrenko was named chief conductor of the Berlin Philharmonic, a position Thielemann was perceived to have coveted for years.
Those rumours were given added piquancy when it was announced that German soprano Anja Kampe, a close friend of Petrenko, pulled out of the role of Isolde with just four weeks to go before the premiere. Thielemann is conducting the new production.
Indeed, the festival was unusually late in confirming this year's official cast lists -- in June, instead of the normal publication date at the start of the year.
Even taking into account the deaths of two cast members in the Germanwings plane crash in France in March, the delay was still extremely unusual.
To cap it all for Katharina, this year marks the 150th anniversary since "Tristan and Isolde" had its world premiere. Hers will be only the 11th production of the work at the Bayreuth Festival.
But she insisted in a recent interview that she does not let such pressures daunt her.
"I'll never be able to fulfil people's expectations of me if those expectations are super-human," she told the newspaper Welt am Sonntag.
"You can't expect a production to be liked by all 2,000 people in the audience. That just isn't possible."
She was nevertheless optimistic, telling the newspaper that already, in putting together the production, "we've achieved what we wanted to achieve".
The Bayreuth Festival runs until August 28 with 30 performances of seven different operas -- "Tristan and Isolde", "Lohengrin", "The Flying Dutchman" and the "Ring" comprising "Rhinegold", "The Valkyrie", "Siegfried" and "Twilight of the Gods".