His overall goal was to work collaboratively and to trespass conventional boundaries. He resented the idea of an isolated artistic genius and his entire production can be seen as a subsequent and vibrant example of praxis in a constant flux. He believed in the need to trespass conventional boundaries between artistic disciplines. This is visible from his engagement in Fluxus, over numerous collaborative performances to his position as a professor at the Art Academy in Hamburg (Hochschule für Bildende Künste - HfBK).
Christiansen lived almost 40 years on the Danish Island Møn. He presented a retrospective exhibition in Copenhagen and participated in the music festival Wundergrund shortly before his death.
Reynolds, William H., and Thomas Michelsen. 2001. "Christiansen, Henning". The New Grove Dictionary of Music and Musicians, edited by Stanley Sadie and John Tyrrell. London: Macmillan; New York: Grove's Dictionaries.