Life at the Yorkshire mansion, one of England's finest Treasure Houses, which was built in the 1700s by Edwin Lascelles, First Baron of Harewood, designed by Robert Adam and landscaped by `Capability" Brown. More than just a visitor attraction, it is now run as a museum dedicated to fine art. David Lascelles, the current eighth Earl of Harewood, and his family sit on the board of the charitable trust and this Christmas have ambitious plans to transform all the grand state rooms with installations from 11 cutting-edge artists in a seasonal showcase entitled `Long Live the Christmas Tree".