| Grand Duke of of Luxembourg | |
|---|---|
| Groussherzog vu Lëtzebuerg Grand-duc de Luxembourg | |
.svg) Arms of the Grand Duke of Luxembourg | |
 Standard of the Grand Duke of Luxembourg | |
.jpg) | |
| Style | His Royal Highness |
| Type | Head of state |
| Residence | Berg Castle, Colmar-Berg |
| Seat | Grand Ducal Palace, Luxembourg City |
| Constituting instrument | Constitution of Luxembourg |
| First holder | William I, King of the Netherlands, Grand Duke of Luxembourg |
| Succession | Guillaume, Hereditary Grand Duke of Luxembourg |
| Website | monarchie |
The Grand Duke of Luxembourg[a] is the head of state of Luxembourg. Luxembourg has been a grand duchy since 15 March 1815, when it was created from territory of the former Duchy of Luxembourg. It was in personal union with the United Kingdom of the Netherlands until 1890 under the House of Orange-Nassau. Luxembourg is the world's only sovereign Grand Duchy and since 1815, there have been nine monarchs, including the incumbent, Henri.
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