The Law of France refers to the legal system in the French Republic, which is a civil law legal system primarily based on legal codes and statutes, with case law also playing an important role. The most influential of the French legal codes is the Napoleonic Civil Code, which inspired the civil codes of Europe and later across the world. The Constitution of France adopted in 1958 is the supreme law in France. European Union law is becoming increasingly important in France, as in other EU member states.