Wentworth Woodhouse is a Grade I listed country house in South Yorkshire, with the longest façade of any country house in England. It stands in 83 acres of gardens and grounds and has extensive views over former parkland including a deer park and lakes which are vested in the Fitzwilliam Wentworth Amenity Trust.
Wentworth Woodhouse was built for the 1st Marquess of Rockingham from c.1735, the work continuing over four decades, and then passed to the Fitzwilliam family. During World War II the mansion was taken over for use by Military Intelligence and after 1945 the onset of open cast coalmining in the garden and park made it impossible for the family to return. The greater part of the house was let in 1947 to West Riding County Council, on a long lease, shortly before the death of the 8th Earl Fitzwilliam in a plane crash in 1948. The house was used as a Training College for PT teachers.
Following local government reorganisation in 1974 Rotherham Metropolitan Borough Council became the lessee and the property was taken over as a student campus for Sheffield Polytechnic College (now Sheffield Hallam University). Faced with mounting costs Rotherham paid to surrender the lease in 1988. The house and 83 acres of grounds and parkland were sold to W.G. Haydon-Baillie in 1989. In 1995 Haydon-Baillie charged the property to Bank Julius Baer (BJB) which took possession in 1998. The property was bought by the Newbold family in 1999 who continue in residence.