The Grand Ducal Palace (Luxembourgish: Groussherzogleche Palais, French: Palais grand-ducal, German: Großherzogliches Palais) is a palace in Luxembourg City, in southern Luxembourg. It is the official residence of the Grand Duke of Luxembourg, and where he performs most of his duties as head of state of the Grand Duchy.
The building was first the city hall of Luxembourg from 1572 to 1795, the seat of the prefecture of the Département des Forêts in 1795, and then the headquarters of the Luxembourg Government in 1817.
Information from:
en.wikipedia.org/wiki/Grand_Ducal_Palace,_Luxembourg 