Roy Lichtenstein “Curtains” / pen

(In 1993, Reginald Walker, 21, was temporarily employed as a guard at the Whitney Museum when he wrote a love note to his girlfriend on Lichtenstein’s 1966 painting. Using a felt-tipped pen, Walker drew a heart on the canvas, along with the inscription, ‘Reggie and Crystal / I Love you Tushee /  Love Buns.’)