Mayhem is a Norwegian black metal band formed in 1984 in Oslo, Norway. They were one of the founders of the Norwegian black metal scene and their music has strongly influenced the black metal genre. Mayhem's early career was highly controversial, primarily due to their notorious live performances, the 1991 suicide of vocalist Per Yngve Ohlin and the 1993 murder of guitarist Øystein Aarseth by former member Varg Vikernes of Burzum.
The group released a demo and an EP that were highly influential, and amassed a loyal following through sporadic and notorious live performances, attracting further attention through their ties to the string of Norwegian church burnings and the incidents of violence surrounding them. Mayhem disbanded after Aarseth's murder, shortly before the release of their debut album, De Mysteriis Dom Sathanas, regarded as a classic of the black metal genre. Surviving former members Jan Axel Blomberg, Jørn Stubberud and Sven Erik Kristiansen reformed two years later with Rune Eriksen replacing Aarseth. Attila Csihar and Morten Iversen have since replaced Kristiansen and Eriksen, respectively. Their post-Aarseth material is characterized by increased experimentation.
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