Peccatum was a musical project that marked a significant chapter in the Norwegian experimental and avant-garde metal scene. Formed in 1998, the group was a collaborative effort led by eminent black metal artist Ihsahn, well-known as the frontman of the influential band Emperor, alongside his wife Ihriel, also known as Heidi S. Tveitan, with her dramatic operatic vocals and keyboard work, and her brother Lord PZ.

The ensemble was notable for its eclectic mix of styles, incorporating elements of black metal, classical music, and electronica. This unique blend produced a sound that was both atmospheric and intense, challenging traditional genre boundaries. Peccatum released several records that captured the attention of fans and critics alike, with their last EP, "The Moribund People," leaving a lasting impression upon its release in 2005. Prior to that, their 2004 album "Lost In Reverie" showcased the band's propensity for melding haunting melodies with strikingly heavy riffs, further refining their signature sound. Their third studio album, "Amor Fati" (2000), followed the success of their prior endeavor "Oh My Regrets," an EP released in the same year that continued the themes and aesthetic of their first full-length album "Strangling From Within" (1999). Peccatum's work, characterized by intense emotion and profound lyrical concepts, continued to explore the depths of human experience until the group ultimately disbanded in 2006, leaving behind a legacy of innovation within the metal genre.