The Court of Pleas of the County Palatine of Durham and Sadberge, sometimes called the Court of Pleas or Common Pleas of or at Durham was a court of common pleas that exercised jurisdiction within the County Palatine of Durham (including the wapentake of Sadberge) until its jurisdiction was transferred to the High Court by the Supreme Court of Judicature Act 1873. Before the transfer of its jurisdiction, this tribunal was next in importance to the Chancery of Durham. The Court of Pleas probably developed from the free court of the Bishop of Durham. The Court of Pleas was clearly visible as a distinct court, separate from the Chancery, in the thirteenth century.