Since the Judiciary Act of 1789, Supreme Court justices had “ridden circuit,” serving as trial judges for the circuit courts. In 1891, Congress creates the U.S. Courts of Appeals, but allows the circuit courts to continue for 20 more years. In 1911, the circuit courts will be abolished and their jurisdictions will be transferred to the district courts. In the early 21st century, there will be 94 U.S. judicial districts organized into 12 regional circuits, each one having a U.S. Court of Appeals.