Overview
- Grand Duke Henri, 70, signed the act of abdication at the Grand Ducal Palace, concluding 25 years on the throne.
- Guillaume, 43, took the constitutional oath before the Chamber of Deputies and said he aims to "build bridges between generations, between tradition and innovation."
- The new Grand Duke and Grand Duchess Stéphanie greeted crowds from the palace balcony, with a weekend tour to conclude at Sunday Mass in Notre-Dame Cathedral.
- European royals and officials attended, including Dutch and Belgian representatives, with Presidents Emmanuel Macron and Frank-Walter Steinmeier expected at a gala dinner.
- Pope Leo XIV sent a congratulatory telegram, and Prince Charles became heir apparent, reported as the youngest in Europe.