Celtic Frost
In the early 1980s, extreme metal pioneers Hellhammer emerged from suburban Zürich before morphing into the more sophisticated Celtic Frost, a groundbreaking band whose pivotal early albums, "Morbid Tales", "To Mega Therion" (with cover artwork by famed Swiss artist H.R. Giger) and "Into the Pandemonium", revolutionized heavy metal musically as well as aesthetically. After the initial breakup of Celtic Frost, band leader Tom Warrior, a.k.a. Tom Gabriel Fischer, formed industrial rock outfit Apollyon Sun before successfully reforming Celtic Frost in 2001. As of 2008, Fischer was leading the CF spin-off Triptykon.