Article Three of the United States Constitution

Structure and main provisions

• Judicial power: vests judicial authority in one Supreme Court and such lower courts as Congress may ordain and establish. See the role of the Supreme Court.
• Jurisdiction: federal courts hear cases arising under the Constitution, federal laws, treaties, controversies involving the United States, controversies between states or citizens of different states, and related matters.
• Trials: criminal trials require jury trials except in impeachment cases; trials are generally held in the state where the alleged crime occurred.
• Treason: treason is specifically defined and conviction requires stringent proof: either a confession in open court or testimony from two witnesses to the same overt act.

Powers, limits, and personnel

Article III sets several important protections for federal judges. Judges hold office during "good Behaviour," commonly interpreted as life tenure unless removed through impeachment. Their compensation cannot be reduced while in office, a safeguard intended to protect judicial independence. Congress retains the authority to create and organize lower federal courts and to regulate their jurisdiction within constitutional bounds; consult Congressional powers and the statutes that establish the federal judiciary via inferior courts.

Historical development and significance

The constitutional clauses in Article Three are concise but foundational. Over time, practices and judicial doctrines—most notably the establishment of judicial review by the early Supreme Court—have clarified the practical scope of judicial authority. Article Three’s provisions on treason and jury trial reflect 18th‑century concerns about preventing political prosecutions and preserving local adjudication of crimes.

Notable distinctions and role today

Article Three differs from Articles One and Two by focusing on adjudication rather than lawmaking or execution. It provides structural protections intended to balance independence and accountability. Contemporary questions about the size and jurisdiction of federal courts, the appointment process, and the contours of judicial review all trace back to the framework Article Three supplies.