 The inner lobby has two curved staircases with a sheet aluminum treatment, and marble walls with a zigzag pattern.The axial centre at the rear of the building has a round glazed façade; here, the view of the buildings at the rear of the site (the "casino") is maximised by the curved walls that afford vistas to the subsidiary buildings 100 m distant, separated from the main building by parkland and a pool.During the American occupation of the building, this rotunda housed a small kiosk; later, it was used as a conference room.