News from the Grand Ducal Family News are only available in the original language.Categories Education Commemorations & Birthdays Conferences Education Environment & Ecology WeddingsMembers of the Family H.R.H. the Crown Prince H.R.H. the Grand Duke H.R.H. the Grand Duchess H.R.H. the Crown Prince H.R.H. the Crown PrincessDates 2013 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2013 2009Keywords Reset Education 2013 H.R.H. the Crown Prince 25ème anniversaire de l'Harmonie des Jeunes Prince Guillaume25.10.2013