American heavy metal band from Alexandria, Virginia, most famous as one of the pioneers of heavy metal, and the sub-genre of doom metal in particular. As such, they are considered one of the "big four of doom metal," alongside Candlemass, Saint Vitus and Trouble. The band was prolific in the underground scene of the 1970s, producing many demos and rehearsal tapes, but did not release a full-length album until re-forming in the early 1980s with an almost completely new line-up. Throughout the band's history, the only constant member has been vocalist Bobby Liebling..
