The U.S. Court of Appeals for the D.C. Circuit is one of the thirteen federal appellate courts in the United States. It is located in Washington, D.C., and primarily hears cases involving federal regulations and government actions. This court is often considered the second most important court in the country, as it reviews decisions made by federal agencies. Established in 1893, the D.C. Circuit has jurisdiction over cases that arise from various federal laws and regulations. It plays a crucial role in shaping U.S. law, particularly in areas related to administrative law and constitutional issues. Notable figures, such as Supreme Court Justices, have served on this court before their appointments.