Founded in 1991, Gregorian is a German musical project conceived by producer,
songwriter, and musician Frank Peterson (born in Hamburg, Germany on December
29, 1963). Connecting with producer Michael Cretu, Frank Peterson was invited to
join pop singer Sandra’s band. Working several years with Sandra, who was
Cretu’s wife, Frank Peterson became involved with the couple’s musical project
Enigma. While he was heavily involved with the group’s debut 1990 debut album,
MCMXC a.D., he left the Cretus and Enigma behind and started a similar group
that he called Gregorian. In 1991, they ...