Robert Morris was one of the central gures of Minimalism, and his work is stripped down to the essentials of color and geometric shapes, focusing on the artwork’s interaction with the viewer. Robert Morris’s Model relates to a larger endeavor, his planned and never realized contribution to Land artist Robert Smithson’s runway project for the Dallas-Fort Worth airport. In 1966, Morris had created a rectangular plaster model showing the circular earth mound he proposed to Smithson, invoking a form he had employed in his earlier Minimalist work. For "Model," he rendered the mock-up in molded plastic and, uncharacteristically, chose a deep green, suggesting the grassy hill that he envisioned.