Ulver (Norwegian for "wolves") are a Norwegian experimental musical collective founded in 1993, by vocalist Kristoffer Rygg. Their early works, such as debut album Bergtatt, were categorised as folklore-influenced black metal, but have since evolved a fluid and increasingly eclectic musical style, blending genres such as rock, electronica, symphonic and chamber traditions, noise, progressive and experimental music into their oeuvre. 1997 marked their international debut with the release of their third album Nattens madrigal through German label Century Media. However, following discord with the label, Kristoffer Rygg formed his own imprint Jester Records in 1998. British composer and multi-instrumentalist Daniel O'Sullivan joined the collective in 2009, and the band performed some of their first live concerts in their 15-year lifespan, including the prestigious Norwegian National Opera.
Ulver have sold in excess of half a million records, have well over 11,000,000 plays on Last.fm, been twice nominated for the Norwegian Grammy Awards, Spellemannsprisen, in different categories, won Album of the Year at the Oslo Awards for Shadows of the Sun in 2008, won the NATT&DAG award for Best Live Act in 2011, and earned a global reputation for stylistic unpredictability.
Acclaim from the artistic community includes controversial director of films Kids and Gummo, Harmony Korine, recently commented, alluding to The Marriage of Heaven and Hell: "There's a real lineage from a composer like Wagner to a band like Ulver." Author and musician Julian Cope has said, "Ulver are cataloguing the death of our culture two decades before anyone else has noticed its inevitable demise."