His work has been included in several books listing contemporary artists, such as Art Now, published by Taschen.
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He has also shown work in group exhibitions including the 2004 Venice Biennale, Drawing Now at the Museum of Modern Art in New York, Chère Paintre, Liebe Maler, Dear Painter at the Pompidou Centre in Paris, A Perilous Space at Magnani in London and Kaiki at Focal Point Gallery in Southend-on-Sea.
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Along with Yair Oelbaum, he conceived the dramatic play There we will be buried (2010), which debuted in 2011 at the Dixon Studio in Southend-on-Sea in Essex, England.
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Althoff has been the subject of solo exhibitions worldwide, including at the Vancouver Art Gallery; Institute of Contemporary Art, Boston; Museum of Contemporary Art, Chicago; Kunsthalle Zürich; and Simultanhalle, Cologne.
Chiang Kai-shek | Kai Tak Airport | Chiang Kai-Shek | Kai Winding | Kai Hansen | Kai Eckhardt | Kai Althoff | Kai | Sun Hung Kai Properties | Kudo-kai | Kai Province | Kai Islands | Kai Holst | Kai-Fu Lee | Kai En Tai | Chiang Kai-shek Memorial Hall | Risshō Kōsei Kai | RAF Kai Tak | Qin Kai | Liang Kai | Kai province | Kai Nielsen | Kai Khosrow | Kai Erik Herlovsen | Kai Diekmann | Dojin-kai | Carole Kai | Sumiyoshi-kai | Qin Kai (general) | Qin Kai (diver) |
He curated several one-person exhibitions, including Kai Althoff, Gerard Byrne, Olafur Eliasson, Brian Jungen, Isa Genzken, Liam Gillick, Billy Apple, Mathias Poledna, Stephen Prina and Cerith Wyn Evans.