sentences:  The design reflects the building's original dual purpose being divided longitudinally with the exhibition galleries of the RSA to the east and the National Gallery to the west.Playfair worked to a much more limited budget than the RSA project, and this is reflected in his comparatively austere architectural style.He may have drawn inspiration from an 1829 scheme for an arcade of shops by Archibald Elliot II, son of Archibald Elliot.