Hailing from Villingen-Schwenningen, Germany, Imperium Dekadenz is a black metal band formed by guitar players Pascal "Vespasian" Vannier and Christian "Horaz" Jakob in 2004. The two bandmates introduced their aggressive, atmospheric, and guitar-driven sound with the independently-released EP Promo 2005. Recorded in 2005 and sent to various labels, Promo 2005 helped earn Imperium Dekadenz a two-album deal with the German label Perverted Taste. One year later, the band made its label debut with …und die Welt ward kalt und leer, followed one year later by the sophomore record Dämmerung der Szenarien. Although the band didn't tour behind either release, Vespasian and Horaz expanded Imperium Dekadenz's lineup to include bassist Christoph "Harvst" Brüderer, guitarist Dennis "Naavl" Schälicke, and guitarist Bastian "Kaelt" Brüderer, all three of whom previously performed in the band Vargsheim. After signing a new deal with the French label Season of Mist, Imperium Dekadenz released Procella Vadens in 2010. Albums like 2013's Meadows of Nostalgia, 2016's Dis Manibvs, and 2019's When We Are Forgotten followed. When We Are Forgotten marked the band's first release for Napalm Records, and the band remained on Napalm's roster for 2023's Into Sorrow Evermore, which debuted at Number 31 on the German charts.