At Matthew Marks, New York, the artist’s enigmatic marbles and projections perform a subtle excavation of the gallery’s architecture
Ahead of Art Cologne this week, a guide to the best current shows in the city
Helen Marten wins the 2016 Turner Prize; Harper Lee and Mark Twain novels removed from US schools; Ousmane Sow passes away
Fridericianum, Kassel, Germany
Negar Azimi is senior editor of Bidoun.
Casey Kaplan Gallery, New York, USA
Listen now: Christian Jankowski, Nancy Spector and others discuss the relationship between art and entertainment