Allerseelen is an Austrian experimental music project that was founded in 1987 by Gerhard Petak. Petak began a professional career as a drummer for the Orgien-Mysterien-Theater before establishing the group, which became a solo project in 1989. The project is famous for a musical style that encompasses neofolk, martial industrial, and post-industrial elements. Their debut studio album, Cruor (1994), includes instrumental recordings from the project's early years. The discography includes the recordings Gotos=Kalanda (1995), Sturmlieder (1996), Neuschwabenland (2000), and Venezia (2001). Petak has collaborated with several artists, including the ensemble Kirlian Camera and the project Ô Paradis. Petak performed with the project at the Wave-Gotik-Treffen in 1997 and 2000. Their later work includes the studio albums Chairete Daimones (2019) and Toteninsel (2024).