Here is one of the song's that they sing Live in Prague
Gregorian is a German band headed by Frank Peterson that performs Gregorian chant-inspired versions of modern pop and rock songs. The band features both vocal harmony and instrumental accompaniment.
Originally, Gregorian was conceived as a more pop-oriented group in the vein of Enigma. Under this concept, they recorded the 1991 album Sadisfaction, with lead vocals provided by The Sisters of Oz: Susana Espelleta (Peterson's wife at the time) and Birgit Freud. However, this was the only album in that style.
In 1998, Peterson and his team of Jan-Eric Kohrs, Michael Soltau and Carsten Heusmann re-invented the project to perform popular songs in the Gregorian style. The criteria for song selection were strict; in order to be considered, a song needed to be translatable into the 7-tone scale. For each album, songs were carefully chosen in addition to original songs written by Jan-Eric Kohrs, Amelia Brightman and Carsten Heussman. Twelve vocalists - previously acclaimed session and choir singers - were then hired to record the tracks.
Each Gregorian album is initially digitally tracked at Nemo Studios, Peterson's Hamburg studio. The vocalists then record their parts in a church atmosphere with dimmed lights and candles, in order to escape what Peterson referred to in a 2001 interview as the "cold and technical" studio atmosphere. The concept proved to be successful, and the group proceeded to record several more Masters of Chant albums in the same style. Their 2004 album, The Dark Side, was a slight departure from the others, featuring a darker repertoire consistent with the title.
In 2005, The Masterpieces, a compilation album with a live DVD, was released. A fifth Masters of Chant album was released on 31 March 2006. In 2006, a festive album was also released, titled Christmas Chants. A sixth Masters of Chant album was released on 28 September 2007. In 2009 a seventh Masters of Chant album followed. On 8 September 2010 the next album, titled The Dark Side of Chant, was announced to be published on 15 October 2010. On 14 September 2012 a new album titled Epic Chants was published with the collaboration of the Australian newcomer Eva Mali.
Gregorian have toured parts of Europe, China, Russia and Japan. Live concert DVDs have also been released.
The members of Gregorian are Richard Naxton (Naxos), Johnny Clucas (Johnny), Chris Tickner (Chris T.), Richard Collier (Rich), David Tilley (DT), Gerry O'Beirne (Gerry), Lawrence White (Lorro), Rob Fardell (Rob F.), Daniel Williams (Dams), Brendan Matthew (Bren) and Ashley Turnell (Ash).
Others who contribute to the vocals or sound of Gregorian are Sarah Brightman (under the pseudonyms Hepsibah or Sarah Hellmann), Amelia Brightman (Sarah Brightman's younger sister), Frank Peterson, and staff of Nemo Studio among others.
Gregorian have released nine albums in their Masters of Chant series and a number of other albums, including a Christmas album. They have also released two types of video album; live concerts and music video albums featuring the singers in various surroundings.
What is Gregorian Chants
Gregorian chant is the central tradition of Western plainchant, a form of monophonic, unaccompanied sacred song of the western Roman Catholic Church. Gregorian chant developed mainly in western and central Europe during the 9th and 10th centuries, with later additions and redactions. Although popular legend credits Pope St. Gregory the Great with inventing Gregorian chant, scholars believe that it arose from a later Carolingian synthesis of Roman chant and Gallican chant.
Gregorian chants were organized initially into four, then eight, and finally twelve modes. Typical melodic features include characteristic ambituses, intervallic patterns relative to a referential mode final, incipits and cadences, the use of reciting tones at a particular distance from the final, around which the other notes of the melody revolve, and a vocabulary of musical motifs woven together through a process called centonization to create families of related chants.
Click on this link to go to there Fan page