The corporate, financial and personal affairs of the family - numbering around 150 blood relatives of John D. Rockefeller - are run from the family office, "Room 5600", known officially as "Rockefeller Family and Associates". It comprises three floors of the GE Building in Rockefeller Center. All private family legal matters are handled by the family-associated New York law firm of Milbank, Tweed, Hadley & McCloy. Room 5600 is also the base of the current family historian, "Peter J. Johnson", who assisted with David Rockefeller's "Memoirs", published in 2002.