What did the Vanderbilts build in NYC?

Petit Château, Midtown Manhattan Petit Château was also known as William K. Vanderbilt House, named for Cornelius's grandson, for whom it was built. William's wife, Alva, was deeply involved in the design of the home and opted for a balance of French Gothic architecture with Beaux Arts–style elegance.



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With more than 600 acres of landscaped property and a palatial Beaux-Arts mansion, the Hyde Park estate came to symbolize the enormous wealth accumulated by a privileged few during the Gilded Age. Today, the Vanderbilts' Hyde Park home is preserved as Vanderbilt Mansion National Historic Site.

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From her father's first marriage to Cathleen Neilson, she had one elder half-sister, Cathleen Vanderbilt. Upon their father's death from cirrhosis when Vanderbilt was 18 months old, she and her half-sister became heiresses to a half share each in a $5 million trust fund, equivalent to $83 million in 2022 value.

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1. Biltmore Estate (Asheville, North Carolina): 175,000 square feet. The Biltmore Estate isn't just the largest privately owned house in the United States — it blows the competition out of the water.

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