 The Smithsonian declined to make the changes needed to convert Hillwood to a museum, and complained that by 1975 the endowment, producing $450,000 annual income, was insufficient to maintain the site.Accordingly, Hillwood and the majority of the collection was returned to the Post Foundation by April 1976.Hillwood is now maintained by the Post Foundation as the "Hillwood Museum and Gardens", showcasing 18th and 19th century French art and art treasures from Imperial Russia.