Catherine Kate Middleton, la duchesse de Cambridge en visite accompagnée du grand-duc héritier Guillaume et a femme la comtesse Stéphanie de Lannoy au Luxembourg, le 11 mai 2017. The Duchess of Cambridge walks along along the Cornicjhe in Luxembourg Cit, during a day of visits in Luxembourg where she is attending commemorations marking the 150th anniversary 1867 Treaty of London, that confirmed the country's independence and neutrality.11/05/2017 - Luxembourg - Photo