Gregorian returns to the Bilheimer Capitol Theatre for the Pure Chants World Tour featuring songs of Enigma. For 25 years, Gregorian have thrilled millions of people worldwide with their choreographed shows and their ability to switch seamlessly from classical chorales to pop and rock songs. Their concerts have set new standards.

With over 2,000 shows in 36 countries and more than 11 million albums sold, GREGORIAN are the most successful choir in the world.

In Spring 2026, Gregorian will continue with their Pure Chants World Tour in the USA.

Frank Peterson, the creator and producer of Gregorian says: “Our Pure Chants concerts bring the most popular Gregorian classics in an atmospheric and tranquil sound environment. Pure Chants concerts are extremely peaceful, yet spectacular and unite the audience with the most beautiful melodies in the world.”

The idea for Gregorian was born when Frank Peterson visited the royal monastery of San Lorenzo de El Escorial in Spain in 1989. Wandering through the medieval monastery and castle complex and listening to contemporary music on his Walkman, he found the inspiration for the sound experiment of mixing ancient Gregorian music with modern music.

Peterson first realized his idea with Michael Cretu and the worldwide sound phenomenon Enigma. Their first album MCMXC a.D. was released in 1990 and quickly became a worldwide success. MCMXC a.D. was number 1 in 41 different countries and went 57 times platinum and 45 times gold. It is considered as the most successful German album of all time worldwide.

This gigantic success paved the way for Gregorian to take the musical idea one step further and to establish it as an independent music act. In 1999, with the start of production on the first album Masters Of Chant, Frank Peterson seamlessly built on the success of Enigma. In the following years, Gregorian sold over 11 million CDs and 7 DVDs worldwide and achieved gold and platinum status in 24 different countries.

Frank Peterson has been involved in various musical projects and international productions for over 30 years. He has worked as a producer with Sarah Brightman, Enigma, Justin Timberlake, Andrea Bocelli, Paul Stanley (Kiss), Backstreet Boys, Alannah Myles, José Carreras, Tom Jones, Plácido Domingo, Errol Brown, Ofra Haza, Sandra, Josh Groban, Marky Mark, I Muvrini, Florent Pagny and Ricardo Cocciante, among others. In addition to Gregorian, Peterson has also been working as a show producer for Sarah Brightman and other top stars since 2005. Together with the world star, he produced the album and cinema production Sarah Brightman - Hymn, which was acclaimed by critics worldwide.