With a reported 365 rooms this 'calendar house' has room for every day of the year, including a private family barber’s room and one dedicated to storing candles and light bulbs.

Corridors were so vast and confusing in its heyday that guests were said to be given baskets of confetti to scatter on the floor like breadcrumbs to guide them back to their rooms at night.

A ball hosted by Charles the 2nd Marquess of Rockingham for the prince and his guests cost a small fortune. A letter discovered from an attendee told of 8,250 oil lamps illuminating the Marble Saloon.

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