who is the head of state in luxembourg
Monarchy of Luxembourg The Grand Duke of Luxembourg is the monarchical head of state of Luxembourg. Luxembourg has been a grand duchy since 15 March 1815, when it was elevated from a duchy, and was in personal union with the United Kingdom of the Netherlands until 1890 under the House of Orange-Nassau and is the world's only sovereign grand duchy. Since 1815, there have been nine monarchs of Luxembourg, including the incumbent, Henri.