Osterley Park (1761-1763)
The house is of red brick with white stone details and is approximately square, with turrets in the four corners. Adam's design, which incorporates some of the earlier structure, is highly unusual, and differs greatly in style from the original construction. One side is left almost open and is spanned by an Ionic pedimented screen which is approached by a broad flight of steps and leads to a central courtyard, which is at piano nobile level. Adam's neoclassical interiors are among his most notable sequences of rooms, which are characterised by elaborate plasterwork, rich, highly varied colour schemes, and a degree of coordination between decor and furnishings unusual in English neoclassical interiors. Notable rooms include the entrance hall, which has large semi-circular alcoves at each end, and the Etruscan dressing room, which Adam said was inspired by the Etruscan vases in Sir William Hamilton's collection. Adam also designed the opulent domed state bed, still in the house.