Luxembourg

• The Constitution, the highest law
• The Civil Code (from the Napoleonic code) and other codes and statutes, written mainly in French
• European Union law, which takes priority in its area
• Case law, which guides the courts, and French and Belgian scholarship, which is widely read

• The Court of Cassation, which checks that lower courts applied the law correctly
• The Constitutional Court, which reviews laws, and the Administrative Court for disputes with public bodies
• The Court of Appeal and district courts, with justices of the peace

A degree in law (often studied partly abroad), a Luxembourg course and a traineeship (stage) with a lawyer, then registration with the Luxembourg Bar.

• The law is written mostly in French although the people speak three languages.
• Luxembourg has followed French and Belgian law closely for over two centuries.
• Many Luxembourg lawyers studied in France, Belgium or Germany.
• The country is a major centre for investment funds, so its financial and company law is heavily used internationally.

France, Belgium, Germany, Netherlands, Switzerland

The University of Ottawa’s JuriGlobe database lists Luxembourg as: Civil law. It names the systems in order of importance.

The map colours a country by the first-named system, and shows both civil-law and common-law countries as “mixed”. It is a simplification, and real systems are rarely pure.

Albania, Algeria, Angola, Argentina, Armenia, Austria, Azerbaijan, Belarus, Belgium, Benin, Bolivia, Bosnia and Herzegovina, Brazil, Bulgaria.

• Luxembourg Justice portal

Sources last reviewed: October 2026.