Subject of the commemorative coin:
 150th anniversary of the adoption of the Constitution (nineteenth in the 'Luxembourg Dynasty' series)

 Description of the design:
 The design shows on the left the effigy of His Royal Highness the Grand Duke Henri, looking to the right. On the right side of the design are the dates ‘1868-2018’ and the text ‘150 ans’ (150 years). Below the effigy of the Grand Duke are the text ‘Constitution du Grand-Duché de Luxembourg’ (Constitution of the Grand Duchy of Luxembourg) and a section of an open book. The coin’s outer ring depicts the twelve stars of the European flag.