Gregorian is a German band known for its unique fusion of traditional Gregorian chant and modern pop and rock music. Formed by producer Frank Peterson in 1999, the group gained popularity with their debut album, "Masters of Chant," which featured meditative choral covers of contemporary hits. Over the years, Gregorian has released numerous albums and toured internationally, captivating audiences with their ethereal harmonies and dramatic live performances. The group's music is characterized by a blend of ancient and modern sounds, creating a transcendent auditory experience that bridges different musical eras.