Therion, formerly known as Blitzkrieg (1987-1988) and Megatherion (1988), is a symphonic metal band founded by Christofer Johnsson in Upplands Väsby, Sweden in 1987. Therion was initially a death metal band, however starting with 1995’s Lepaca Kliffoth, Therion began to gradually incorporate symphonic elements into their metal music. The band has seen many changes in line-up and style throughout its history with Christofer Johnsson being the only constant member.