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They fit perfectly into the Advent season--Gregorian--an eight man choir, singing the old liturgical forms transformed by new ideas and gripping musical sounds.  In the packed, spatically reduced Wurzburg Congress Center, the fans were thrilled by the dazzling light and sound show.  The singers are dressed in simple cassocks.   The draft and precison of the choirs classical voices characterize the expression of the Gregorian chant and transforms the slightly clouded concert space into a Gothic cathedral.  A touch of mysticism, inherent in  original Gregorian chant, is palpable in the room.

An imaginative idea--ancient Gregorian chants mixed with modern pop music--set producer Frank Peterson into action in the early '90's.  Over the past decade, more and more rock elements have found their way into the reportiore and accompany the group on their Anniversary tour.  "The Raven", which includes a brilliant solo by guitarist Gunther Laudahn, is a catchy example of the cross over style of Gregorian.  The choir moves in a serene,  monastic and dignified style of choreography to accompany their songs.

The quieter songs, with soothing and sometimes spherical-like sounds, such as "Sweet Child Of Mine" and "A Whiter Shade of Pale" flow gently into the room.  Amelia Brightman's voice gives the monastic choir a trace of erotocism while dueting with the choir on "Kashmir" complete with a hint of belly dancing and flowing veils.

With astonishing richness, a colorful orgy of lights is staged, which gives surprising effects to the selections and dazzles the eyes to accompany the beautifully adapted rhythms and harmonies of Gregorian.   With the finale "Hymn" the powerful voices of the brilliant ensemble is highlighted and concludes the much acclaimed concert.