Overview

• Grand Duke Henri, 70, abdicated at the Grand Ducal Palace, ending a 25-year reign.
• Prince Guillaume, 43, was sworn in before the Chamber of Deputies to become head of state.
• Foreign guests include French President Emmanuel Macron, German President Frank-Walter Steinmeier, and Dutch and Belgian royals.
• A weekend program features a balcony greeting, a national tour, and a Sunday Mass at Notre-Dame Cathedral.
• The monarchy’s powers remain limited, as Guillaume signals a personal focus on social initiatives and has launched a donor-funded charity.