What is the importance of Le Beau Chateau in the biography, Empty Mansions?

Le Beau Chateau is an estate in Connecticut that Huguette bought in the mid-1950s. Huguette apparently bought the estate as a retreat in case of political or military action in the United States. Huguette had the house extensively renovated after purchasing it, including the addition of hand carved spindles in the staircase. However, the house was never furnished, never decorated, and never lived in. The house remain empty for more than fifty years and was not as well cared for as Bellosguardo. The house suffered overgrowing vegetation, causing damage to a tennis court and several windows.