Henning Christiansen (1932 to 2008) was a Danish composer and a pioneer of Fluxus who set out to dismantle the hierarchies between composer, performer and audience. His decades-long collaboration with Joseph Beuys produced some of the most famous actions of postwar art, in which his green-tinged, repetitive scores met Beuys's felt, fat and political speech. With his wife, the artist Ursula Reuter Christiansen, he co-founded a kind of artists' colony on the Danish island of Møn, where art and daily life were meant to intersect.

Henning Christiansen (1932 to 2008) was a Danish composer and a pioneer of Fluxus who set out to dismantle the hierarchies between composer, performer and audience. His decades-long collaboration with Joseph Beuys produced some of the most famous actions of postwar art, in which his green-tinged, repetitive scores met Beuys's felt, fat and political speech. With his wife, the artist Ursula Reuter Christiansen, he co-founded a kind of artists' colony on the Danish island of Møn, where art and daily life were meant to intersect.