St. John’s Lodge was built in 1819, designed by John Raffield, later enlarged by Decimus Burton and again in the Victorian era by Sir Charles Barry (architect of the Houses of Parliament). It has been privately occupied apart from periods of the 20th century when used by St Dunstan’s Hospital for blind veterans and the London Institute of Archaeology. The garden was much reduced in size when a portion was incorporated into the Park, and is known now as St. John’s Lodge Garden. It is open to the public.