Berg Castle

Berg Castle , also called Colmar-Berg, is the principal residence of the Grand Duke of Luxembourg. It is situated in the town of Colmar-Berg, in central Luxembourg, near the confluence of the Alzette and the Attert, two of Luxembourg's most important rivers.
The estate at Colmar-Berg first came into the possession of the Grand Dukes of Luxembourg in 1845. The Belgian Revolution had divided Luxembourg from the Netherlands, and also into two, undermining Dutch control of the fortress of Luxembourg City. Grand Duke William II sought to establish a suitable Grand Ducal residence in Luxembourg, hoping that a division of his time between The Hague and Luxembourg would placate the local, overwhelmingly Roman Catholic, population. To this end, the Grand Duke bought Berg Castle from the Pasquier estate. In 1848, it was recognised as the exclusive home of the Grand Duke by the newly promulgated constitution.

Wikipedia