At this angle, interior columns reveal the singularity of each of Judd’s repeating boxes. Installation views, Dan Flavin and Donald Judd, David Zwirner, New York, 2013. Photos by Tim Nighswander/IMAGING4ART, courtesy of David Zwirner, New York/London. Dan Flavin artwork © 2013 Stephen Flavin/Artists Rights Society (ARS), New York. Donald Judd artwork © Judd Foundation. Licensed by VAGA, New York.