 Concerned with Hillwood's fate after her death, Post arranged in 1962 to bequeath the estate, along with a $10 million endowment to maintain it, to the Smithsonian Institution so that it might be maintained as a museum.She made the bequest of Hillwood (as well as most of her other properties) contingent upon its being maintained and used according to her wishes (which included the condition that the estate not be used for dining), and she established the Marjorie Merriweather Post Foundation of the District of Columbia to ensure compliance