Original Artwork on Ladder attributed to Keith Haring, 1982. Although this ladder has not been reviewed by the Keith Haring Studio, LLC, those knowledgeable in Haring’s work have no doubt that this joyful ladder was indeed the work of Keith. From the Gary Cassinelli Collection. (Cassinelli was a friend of Mr. Haring’s). This is a vintage library ladder with distinctive Keith Haring designs in gold marker on the wood steps and side rails, 1982. Height: 99” x 18”.