Ortus Cruor Astrum is the eighth album from Norwegian technical black metal band Nocturna, released on January 2nd 2007. It is the last album to feature Nephilim (Andreas Michesten) on keyboards, who quit the same year, replaced by Lady Death (Victoria Kristens), Abyssus' wife. It is preceeded by 2005's Nex Est Meus Vita , Cruor Est Meus Via and followed by 2008's The Rotting God: Lacuna Morbus, which contains songs unused on Ortus Cruor Astrum.