An accord calls for Elyn Zimmerman’s Marabar to head to a new site, with the move and reinstallation financed by the society

Board members say they were unaware that renovation plan would sacrifice Elyn Zimmerman’s installation

Organisation argues that Elyn Zimmerman’s site-specific 1984 work does not deserve protection

Arrangement of boulders around reflecting pool on National Geographic Society campus is cited as a landscape art masterpiece