"Themes from William Blake's The Marriage of Heaven and Hell" is the fourth studio album by Norwegian experimental electronica band Ulver. Produced with Kristoffer Rygg, together with Knut Magne Valle and Tore Ylwizaker, it was issued on 17 December 1998 via Jester Records. It is a musical adaptation of William Blake's poem "The Marriage of Heaven and Hell". The album blends electronics, industrial music elements, progressive metal, avant-garde rock and ambient passages, following Blake's plates as track indexes. Stine Grytøyr, Ihsahn, Samoth and Fenriz all feature as guest vocalists.