Mayhem guitarist Euronymous was "the central figure involved in the formation of the Norwegian black metal scene",[21][better source needed] which he "almost single-handedly founded".[22] During May–June 1991,[23] he opened a record shop called Helvete[24] (Norwegian for "Hell"). The shop was at Schweigaards gate 56 in Oslo. Norwegian black metal musicians often met at the shop and in its basement. They included the members of Mayhem, the members of Emperor, Varg "Count Grishnackh" Vikernes of B