They do now, and they did in Renaissance Italy, when the sculptor Andrea del Verrocchio was creating his panel “Beheading of the Baptist,” for the silver altar in the Florence Baptistery, now in the Cathedral Museum in Florence. The style in which Leonardo drew every detail of the warrior resembled two of the figures in the altarpiece. Radke saw when he examined two of the figures — a youth with a salver (or round plate) and a turbaned officer carrying a baton — was a different level of detail, making them look far more three-dimensional than the rest. For so many in the art world Claes Oldenburg’s Happenings — quirky performance pieces that took place around the country in the early 1960s, including in New York, Dallas, Los Angeles and Chicago, in old storefronts, a shack, a university hall or outdoors — are fairly mythic occurrences, known primarily through scripts, photographs and legends. Iles began working on the show, which opens May 7, she went to meet with the 80-year-old artist in his SoHo studio specifically to discuss films shot at some of the Happenings, an aspect of his early work.

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