News from the Grand Ducal Family News are only available in the original language.Categories History, cultural and social heritage 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. Prince Félix H.R.H. Princess Claire H.R.H. Princess AlexandraDates 2017 2025 2024 2023 2022 2021 2020 2018 2017 2016 2015 2014Keywords Reset History, cultural and social heritage 2017 H.R.H. the Crown Princess Clôture de l'Octave21.05.2017 150 ans de la signature du Traité de Londres en présence de la Duchesse de Cambridge (Kate Middleton)11.05.2017