Berg Castle in Colmar-Berg, whose origins date back to the early 15th century, is the main residence of the Grand Duke of Luxembourg and is surrounded by extensive parkland. The flag on the roof of the tower indicates whether the Grand Duke is in or out. The castle cannot be visited.
- 5 Rue de la Poste L-7730 Colmar-Berg
- Run by Administration Communale de Colmar-Berg
- Website