 In 1964, the year before his death, Kiesler married Lillian Olinsey, his longtime secretary and confidante, as Stefi had advised him to do while she was still living.In May 1965, he traveled to Jerusalem for the inauguration of the Shrine of the Book; seven months later he died in New York City.Kiesler was productive as a theater and art-exhibition designer in the 1920s in Vienna and Berlin.