The `` Rockefeller Archive Center '' , an independent foundation that was until 2008 a division of Rockefeller University , is a vast three-story underground bunker built below the `` Martha Baird Rockefeller '' `` Hillcrest '' mansion on the family estate at Pocantico ( see Kykuit ) .
The `` Rockefeller Archive Center '' , an independent foundation that was until 2008 a part of Rockefeller University , is a vast three-story underground bunker built below the `` Martha Baird Rockefeller '' `` Hillcrest '' mansion on the family estate at Pocantico ( see Kykuit ) .