Born in 1930 in Augusta, Georgia, and now 95, Jasper Johns was pivotal in the postwar art movement and has remained a steady, stoic presence. In the early 1950s, having returned from military service in the Korean War, he began painting targets, maps, and the American flag—subjects that became signatures. In 1972, his development of the crosshatch and a turn towards line-work marked a new artistic chapter. “Sometimes I see it and then paint it. Other times I paint it and then see it,” Johns once said. “Both are impure situations, and I prefer neither.” This exhibition at Gagosian, featuring crosshatch paintings and drawings created between 1973 and 1983, celebrates the 50th anniversary of a 1976 show at Castelli Gallery where many of the works were first on view. —Maggie Turner