The stately staircase is situated on the north side. It is half-covered in buttress and leads into the first floor. In a ground-floor, the main central space is conceived as a sala terrena divided by six columns. The ceremonial Marble hall lined with Ionian demi-columns and gallery occupies the first and the second floor of the building. From this central cylinder the three lower wings run out. In these three square-shaped parts dwelling spaces, receiving rooms, parlours and cabinets are situated.