The Cour de Cassation is the highest court in the French judicial system. It primarily reviews decisions made by lower courts to ensure they comply with the law. The court does not re-examine the facts of a case but focuses on legal interpretations and the application of law. Established in 1790, the Cour de Cassation plays a crucial role in maintaining uniformity in legal rulings across France. Its decisions set important precedents that guide lower courts, helping to shape the French legal landscape and protect the rights of individuals under the law.