Dimmu Borgir is a symphonic black metal band formed in Oslo, Norway in 1993 by Shagrath, Silenoz and Tjodalv. The name of the group; Means "dark towers" in Old Norse, Faroese, and Icelandic. The group's name derives from the Dimmuborgir volcanic formation in Iceland. In the band, which has changed members many times over the years, the founders guitarist Silenoz and vocalist Shagrath are the elements that remain unchanged