Arcturus is a Norwegian avant-garde metal band formed in 1991, originally named Mortem. The band is known for its experimental approach to metal, incorporating elements of symphonic and classical music, melodic transitions, and varying vocal styles. Throughout their career, their sound has evolved from their early black metal beginnings to a more eclectic mix of progressive metal, symphonic black metal, and classical music influences.

The band's discography showcases their penchant for theatricality and innovation. "Aspera Hiems Symfonia," their 1996 full-length debut, already set them apart with its majestic synthesizers and sophisticated songwriting. With subsequent releases like "La Masquerade Infernale" (1997) and "The Sham Mirrors" (2002), Arcturus continued to push boundaries, incorporating elements of jazz, industrial music, and electronica into their complex arrangements. Their 2015 album "Arcturian" marked their return after a decade-long hiatus, reaffirming their status as pioneers in the avant-garde metal scene. The live album "Shipwrecked in Oslo," released in 2006, captures the essence of their dynamic and theatrical performances, showcasing the band’s ability to translate their intricate studio work to the live stage. With a cult following and a reputation for being unorthodox, Arcturus remains a distinctive and influential force in the world of progressive metal.