One of the three courts of common law. The Court of Common Pleas was an offshoot of the curia regis, the court which followed the king on his travels around the country. The insistence of Magna Carta led to a court being established in one place. The court was based at Westminster Hall. In the Middle Ages it was the busiest of the common law courts. Over the centuries this position declined as other courts encroached on its jurisdiction. In the Judicature Act of 1873 the Court of Common Pleas along with the courts of Queen's Bench and Exchequer all became divisions of the High Court of Justice. Ultimately, they were all merged into the Queen's Bench Division in 1880.