Johnson’s 47-acre estate is “a collection of 14 structures that includes the legendary Glass House, completed in 1949; a guesthouse; an art gallery; and a sculpture pavilion, the complex survives as an enticing voyage through the ups and downs of late-20th-century architecture set in a dreamy landscape of rolling lawns and maple trees. But as imposing as it is as a historical landmark, it is as telling about his weaknesses as a designer as about his influence as an advocate for architecture.”