The Grand Ducal Palace is located in the heart of Luxembourg City. During World War II, it was seized by the German occupying forces and converted into a concert hall and tavern; furniture, jewellery and works of art were looted, and swastika flags were displayed on the facade. The interior of the palace was renovated in 1964. Between 1991 and 1996, major renovation work restored the palace to its former glory. It now serves as the place of work of the Grand Duke; it is open to the public in the summer.