Organized by Rory Padeken, curator The circle and the square. Verticals, swoops, and folds. Flat planes and sensuous surfaces. Colors bright and vibrant. During the late 1950s and 60s, artists began to diverge from the painterly, gestural approaches of Abstract Expressionism in favor of what the American art critic Clement Greenberg in 1964 called "post-painterly abstraction." Artists moved in a variety of directions, some in pursuit of paintings pure in color and open in composition while others toward structured, linear designs using familiar geometric shapes. Rejecting a loose application of paint, these artists stained their unprimed canvases or created flat planes of color devoid of any distinctive mark making.