News from the Grand Ducal Family News are only available in the original language.Categories Culture Christenings Commemorations & Birthdays Culture Economy Education Europe History, cultural and social heritage International relations Social & humanitarian activitiesMembers of the Family H.R.H. Princess Alexandra 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 Alexandra Dates 2017 2025 2023 2019 2018 2017 2009Keywords Reset Culture 2017 H.R.H. Princess Alexandra 150 ans de la signature du Traité de Londres en présence de la Duchesse de Cambridge (Kate Middleton)11.05.2017