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Constitutional court


A constitutional court is a high court that deals primarily with constitutional law. Its main authority is to rule on whether laws that are challenged are in fact unconstitutional, i.e., whether they conflict with constitutionally established rights and freedoms.

In 1919 the First Austrian Republic established the first dedicated constitutional court, the Constitutional Court of Austria, which however existed in name only until 10 October 1920, when the country's new constitution came into effect, upon which the court gained the power to review the laws of Austria's federal states. The Czechoslovakian Constitution of 1920, which came into effect on 2 February 1920, was the first to provide for a dedicated court for judicial review of parliamentary laws, but the court did not convene until November 1921.

The list in this article is of countries that have a separate constitutional court. Many countries do not have separate constitutional courts, but instead delegate constitutional judicial authority to their general court system, with the final decision-making power resting in the supreme court. Nonetheless, such courts are sometimes also called "constitutional courts". For example, some have called the Supreme Court of the United States "the world's oldest constitutional court" because it was one of the earliest courts in the world to invalidate a law as unconstitutional (Marbury v. Madison), even though it is not a separate constitutional court.

Prior to 1919 only the United States, Canada and Australia had adopted the concept of judicial review by their courts following shared principles of their similar common law legal systems, which they, in turn, had inherited from British legal practice. (The United Kingdom itself does not have a codified constitution to be reviewed by such a court.)


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