The Boldon Book (also known as the Boldon Buke) contains the results of a survey of the bishopric of Durham that was completed on the orders of Hugh du Puiset, Bishop of Durham, in 1183, designed to assist the administration of the vast diocesan estates. The survey was similar to that of the Domesday Book in the previous century, covering the bishop's lands in what was to become County Durham and other parts of the north east of England that, following the Norman Conquest, were liable to tax by the Prince-Bishop of Durham and not taxed directly by the King of England. It is the first survey undertaken north of the River Tees, where the king's authority was never more than nominal.