Featured images Sigmar Polke Jun 22, 1991 – Sep 8, 1991 Featured images Installation view, Sigmar Polke, MCA Chicago Photo: © MCA Chicago Installation view, Sigmar Polke, MCA Chicago Photo: © MCA Chicago Installation view, Sigmar Polke, MCA Chicago Photo: © MCA Chicago Installation view, Sigmar Polke, MCA Chicago Photo: © MCA Chicago Installation view, Sigmar Polke, MCA Chicago Photo: © MCA Chicago Installation view, Sigmar Polke, MCA Chicago Photo: © MCA Chicago Installation view, Sigmar Polke, MCA Chicago Photo: © MCA Chicago Installation view, Sigmar Polke, MCA Chicago Photo: © MCA Chicago Installation view, Sigmar Polke, MCA Chicago Photo: © MCA Chicago