The 2006 Luxembourg 2 euro commemorative coin marks the twenty-fifth birthday of Hereditary Grand Duke Guillaume. The national side of the coin features a profile portrait of Grand Duke Henri alongside a portrait of the Hereditary Grand Duke Guillaume, both facing towards the left. This dual depiction highlights the continuity of the Luxembourgish monarchy and the succession within the House of Nassau-Weilburg. The design serves as a formal tribute to the heir apparent, reflecting the constitutional significance of the Grand Ducal family in the nation's contemporary history. Surrounding the portraits are the year of issue and the inscription of the country name, LËTZEBUERG. This commemorative issue was produced in a total mintage of 1,052,000 pieces for circulation in 2006.