The Library
This was one of the 1st Duke's favourite rooms and remains almost as it was at the time of his death in 1852. The design and decoration of this room date from about 1740 and are thought to be the work of the architect William Kent. The collection of books include a substantial part of Napoleon's library.

The Gallery
This room was added by Lord Rivers in about 1745. The prints edged in gold beading were added around 1795 and the gold leaf about a century later, in the time of the 3rd Duke. The prints are mainly of Shakespearean scenes, but there are also a number of contemporary portraits. The 1st Duke was so taken with this form of decoration, he used it in several other rooms of the house. The furniture, in the manner of Boulle, was bought by the 1st Duke in Paris in 1817. The carpets were designed for the room by the 7th Duke and woven in Madrid in 1952.

The Drawing Room
The wallpaper in this room was put up by the 1st Duke in 1838. The gilded plasterwork to the ceiling and doors dates from the 1750s and is contemporary with the mirrors, which were bought with the house.

The paintings in this room were captured at the Battle of Vitoria in 1813 from Joseph Bonaparte as he fled from Spain. On their arrival in London it was discovered that they came from the Spanish Royal Collection. The Duke tried to return them to the reinstated King of Spain, Ferdinand VII, but was told that he had won them "by means as just as they are honourable" and to keep them.

Dining Room
Lord Rivers added this room in about 1775, with a ceiling design taken from an illustration in Robert Wood's book The Ruins of Palmyra. The furniture is almost all Regency and the paintings represent members of the 1st Duke's family.