Eight open mouths, eight long robes, purple spots highlight the impressive scenery.

Are these monks or saints, talents or charlatans who forward medieval Gregorian to today and to agree a beautiful brunette at some point in their ranks? Ten years Frank Peterson had sent his most successful creation through the stages, now is "Gregorian - Masters Of Chant," a hit throughout Europe, despite all the hostility. The producer leaned far out the window, when he had to sing in 1999, eight trained singers in mediæval style with rock guitars and synthesizers, popular songs from rock and pop and the whole thing in the fantasy-style lighting.

"Fade To Gray", "Tears In Heaven" or even REM's "Losing My Religion" in robes, church vaults and artificial fog present, not all were fans of the original bands so funny.

In the meantime - it has reached the seventh album - it has also hit cult bands such as Led Zeppelin, Deep Purple and Rammstein. Peterson smile,: "Richie Blackmore has yet told me recently that he love our version of 'Child In Time' very much, Robert Plant likes our Led Zep versions, too."

In addition to Peterson sits Amelia Brightman, younger sister of Sarah Brightman and female voices of the clerical chorales. She can't report any large group of critics, "Rather, I see that probably no one else achieved such a diversified audience. This has, especially with the 'Dark Side' album", -here Gregorian cover Nine Inch Nails, Nick Cave or even Rammstein, "once again increased." Peterson nods, "to us come musical fans and children, the Goth community, fantasy lovers, normal rock fans and medieval specialists."

Such is peterson not. "it's enough to be able to remember some history lessons from school. We carry out any search, we create atmospheres." Amelia Brightman also sees himself "more as part of a show that creates visually first and music second, only something like a feeling for that era."