The Marriage of Heaven and Hell Part I is the sixth studio album by American power metal band Virgin Steele, released in 1994. It is the first part of a trilogy of concept albums, comprising also The Marriage of Heaven and Hell Part II and Invictus, about the relationship between humanity and divinity. The songs of the album do not follow a storyline, but they were inspired by religion, mythology, poetry and the personal beliefs of lyricist DeFeis. De Feis and Pursino played all the bass lines on the album, after bass player Rob DeMartino had left the band.