In 1886, William Rockefeller bought the 200-acre estate and castle, Rockwood, from the heirs of William Henry Aspinwall. Seven years later, John D. Rockefeller bought land in 1893 at Pocantico Hills.
Since 1983, over 1,000 acres of their estate at Pocantico Hills have been deeded to the State of New York. Laurance S. Rockefeller donated the property to New York State in 1999, as part of the Rockefeller State Park Preserve.
