News from the Grand Ducal Family News are only available in the original language.Categories Europe Audiences Christenings Commemorations & Birthdays Conferences Culture Economy Education Environment & Ecology Europe Health History, cultural and social heritage International relations National Day Receptions Religion Social & humanitarian activities SportMembers of the Family H.R.H. the Crown Princess H.R.H. the Grand Duke H.R.H. the Grand Duchess H.R.H. the Crown Prince H.R.H. the Crown Princess H.R.H. Princess AlexandraDates 2017 2025 2024 2022 2019 2017 2014Keywords Reset Europe 2017 H.R.H. the Crown Princess 150 ans de la signature du Traité de Londres en présence de la Duchesse de Cambridge (Kate Middleton)11.05.2017