Vanderbilt Mansion National Historic Site, located in Hyde Park, New York, is one of America's premier examples of the country palaces built by wealthy industrialists during the Gilded Age. The earliest development of the estate began in 1764 when Dr. John Bard purchased land on the east side of the Albany Post Road, where he built Red House and developed the agricultural aspects of the eastern section of the property that continued through Frederick Vanderbilt's occupancy. Frederick W. and Louise Vanderbilt purchased Hyde Park in May 1895 from Langdon's heirs, info wiki