His Royal Highness Grand Duke Henri served as the constitutional monarch of the Grand Duchy of  Luxembourg from 7 October 2000 until his abdication on 3 October 2025, after which his son, Grand  Duke Guillaume, ascended to the throne. The Grand Duke’s reign was characterised by continuity and  a strong commitment to institutional responsibility, as well as by active and consistent engagement in  European and international affairs. Throughout this period, he paid particular attention to supporting  Luxembourg’s economic, cultural, and social actors, notably alongside Grand Duchess Maria Teresa.