The Constitutional Council is the highest constitutional authority in France. It was established by the Constitution of the Fifth Republic on 4 October 1958 to ensure that constitutional principles and rules are upheld. It is housed in the Palais-Royal in Paris. Its main activity is to rule on whether proposed statutes conform with the Constitution, after they have been voted by Parliament and before they are signed into law by the President of the Republic, or passed by the government as a decree, which has law status in many domains, a right granted to the government under delegation of Parliament.

The Palais-Royal is a former French royal palace located on Rue Saint-Honoré in the 1st arrondissement of Paris. The screened entrance court faces the Place du Palais-Royal, opposite the Louvre. Originally called the Palais-Cardinal, it was built for Cardinal Richelieu from about 1633 to 1639 by architect Jacques Lemercier. Richelieu bequeathed it to Louis XIII, before Louis XIV gave it to his younger brother, the Duke of Orléans. As the succeeding Dukes of Orléans made such extensive alterations over the years, almost nothing remains of Lemercier's original design.