Los Angeles sculptor Robert Graham created the towering, bronze Retrospective Column (1981, cast in 1986) for the entrance of the Art of the Americas Building. A new contemporary sculpture garden was opened directly east of the museum's Wilshire Boulevard entrance in 1991, including large-scale outdoor sculptures by Alice Aycock, Ellsworth Kelly, Henry Moore, and others. The centerpiece of the garden is Alexander Calder's three-piece mobile Hello Girls, commissioned by a women's museum-support group for the museum's opening in 1965.