Reverorum ib Malacht evolved from two previous projects led by Karl Hieronymus Emil Lundin and Karl Axel Mikael Mårtensson, PTC (2002-2004) and Symphonia Sacrosancta Phasmatvm (2004). Some of the recordings from these two previous projects ended up being released as part of the Reverorum ib Malacht discography. The band dubs their genre as "Roman Catholic Black Metal".