 
 <prompt> Wetin be di type of room wey dey least common for di palace? Based on di last question, write small tori wey get di answer. E fit be 1 - 20 sentences. Context: <response>: The palace dey measure 108 metres (354 ft) by 120 metres (390 ft), e high 24 metres (79 ft) and e get over 77,000 m2 (830,000 sq ft) of space. E no too big pass Royal Palace of Madrid, Papal Palace for Rome, Louvre for Paris, Hofburg Palace for Vienna, or Forbidden City. E get 775 rooms, including 19 state rooms, 52 principal bedrooms, 188 staff bedrooms, 92 offices, and 78 bathrooms. The main rooms dey for the piano nobile for back of the palace wey dey face garden. The Music Room dey for the centre of the state rooms, e big bow dey show for the front. The Blue and White Drawing Rooms dey by the side of the Music Room. For the middle of the rooms, wey dey link the state rooms, na the Picture Gallery dey, wey get top light and e long reach 55 yards (50 m). The Gallery get plenty artworks like those by Rembrandt, van Dyck, Rubens and Vermeer; other rooms wey dey from the Picture Gallery na the Throne Room and the Green Drawing Room. The Green Drawing Room dey serve as big room wey dey lead to the Throne Room, and e dey part of the way wey people go take reach the throne from the Guard Room wey dey top of the Grand Staircase. The Guard Room get white marble statues of Queen Victoria and Prince Albert, wey wear Roman clothes, dem dey for tribune wey get tapestries. These very formal rooms dey use only for ceremonial and official entertaining, but dem dey open to the public every summer. 