Restoration work begins on Wentworth Woodhouse
3 March 2013 Last updated at 08:28 GMT
One of Europe's biggest private stately homes is sinking due to mineshafts under its foundations.
Wentworth Woodhouse in South Yorkshire, which is twice the size of Buckingham Palace, is going through a multi-million pound restoration.
The Grade I listed house will open its doors to the public for the first time when the building work has been completed.
Phil Bodmer reports.