Elizabeth Bay House is a historic home in the suburb of Elizabeth Bay in Sydney, New South Wales, Australia. Built between 1835 and 1839, Elizabeth Bay House was known as 'the finest house in the colony'. Elizabeth Bay House is a home in the Regency style, originally surrounded by a 54-acre (22 ha) garden, but now situated within a densely populated inner city suburb. It is managed by the Historic Houses Trust of New South Wales as a museum that is open to the public. Elizabeth Bay House is a superb example of Australian colonial architecture, best known for its central elliptical saloon with domed lantern and geometric staircase.