Lansdowne House is a building to the southwest of Berkeley Square in central London, England. It was designed by Robert Adam as a private house and for most of its time as a residence it belonged to the Petty-FitzMaurice family, Marquesses of Lansdowne. Since 1935, it has been the home of the Lansdowne Club. The positioning of the property was rather unusual. It had a large front garden occupying the whole of the southern side of the square, which it faced side on. This arrangement gave Devonshire House on Piccadilly an open aspect to the square.