Before the recordings started bass guitar player Erik Gustafsson decided to leave the band in order to return home to the U.S., but Therion continued as a trio with Peter Hansson, Oskar Forss and Christofer Johnsson filling in on bass guitar.

[1] According to Christofer Johnsson, Beyond Sanctorum saw the band exploring "different elements", like Persian traditional music, and the inclusion of clean singing—female as well as male—to accompany increased keyboard experimentations.

With Beyond Sanctorum, Therion also added vibrant yet unsentimental solos and creative bass harmony to the metal music lexicon.

[4] After recording album, Therion started to play their first live shows in central Europe, mainly in the Netherlands and Belgium, although simultaneously band ran into a few personnel problems.

[1] Deathmetal.org considers Beyond Sanctorum a classic of early 1990s Swedish death metal, dubbing it an "endlessly inventive" album that "stimulate[s] fantasy and thought".