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Works by Havekost are found in the stock of the Museum of Modern Art, the Denver Art Museum as well as in the Marx Collection, the Rubell Family Collection, der Frieder Burda Collection, and the Tate Collection.
His video ‘Just What Is It That Makes Today’s Homes so Different, so Appealing?’ was exhibited at the Sharjah Biennial in 2010 and at Art Basel, Art Statements in 2012, and is in the Tate Collection.
Ans was a noted collector of modern art, advised by her uncle C. Frank Stoop, and donated to the Tate Collection a substantial portfolio that included works by Pablo Picasso, Henri Matisse, Amedeo Modigliani and Edgar Degas.