The nineteenth century Orangery, built by Sydney Smirke for the Rothschild family who also worked on the Brittish Museum. It is now mainly used for wedding photography.
Gunnersbury Park is a park in the Brentford ward of the London Borough of Hounslow, in west London. Purchased for the nation from the Rothschild family, it was opened to the public by Neville Chamberlain, then Minister of Health, on 21 May 1926. The park is currently jointly managed by Ealing and Hounslow borough councils. See here