Son of Charles Pratt, a Standard Oil executive built this house in 1913 in a Tudor style, with 39 panelled rooms, thirteen bathrooms, twelve fireplaces, five cellars, a swimming pool, and flower beds tended by 50 gardeners. It was designed by Trowbridge and Ackerman.
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By the 1950's it was purchased by the then Soviet Union to serve as the retreat for the Russian delegation to the United Nations.
Links: en.wikipedia.org, virtualglobetrotting.com