Since its founding in 1999 by producer Frank Peterson (Enigma, Sarah Brightman, Andrea Bocelli), Gregorian has sold more than 10 million albums and performed for more than 3 million people in 31 countries with its blend of pop/rock songs and chorale in the style of medieval chants. For its first North American tour, the ensemble of eight classically trained English vocalists is joined by special guest performers Amelia Brightman (sister of Sarah) and the sensational countertenor Narcis. The Pure Chants tour, which comes on the heels of a new PBS special by the same title, supports the groups latest releases, Pure Chants I & II.