The Jantar Mantar of India are large outdoor equinoctial sundials that look like strange playgrounds. Five were constructed by the Maharaja Jai Singh II of Jaipur between the years 1724 and 1735; today only four remain. When Isamu Noguchi saw the Jantar Mantar in Delhi and Jaipur, he was fascinated. “You might call them useless architecture or useful sculpture,” he wrote in 1951. “Whether or not they were intended so, Jai Singh’s works have turned out to be an expression of wanting to be one with the universe. They contain an appreciation of measured time and the shortness of life and the vastness of the universe.” With approximately 50 works, this exhibition looks at the way Noguchi pulled architectural dynamics into his sculptures. —L.J.