Château de Houlbec-près-le-Gros-Theil was originally a square castle with rounded corner towers. It was built in the Middle Ages and conquered by English in 1418 (Hundred Years' War) and by Catholic League in 1588 (during the Wars of Religion). The castle was rebuilt in 1786 and heavily damaged by fire in 1910. Today the château is abandoned but two towers and other signicant ruins still remain.
References:The Royal Palace was built in the first half of the 19th century as the Norwegian residence of King Charles III, who also reigned as king of Sweden and otherwise resided there, and is the official residence of the present Norwegian monarch. The crown prince resides at Skaugum in Asker west of Oslo. The palace has 173 rooms.
Until the completion of the Royal Palace, Norwegian royalty resided in Paleet, the magnificent town house in Christiania that the wealthy merchant Bernt Anker bequeathed to the State in 1805 to be used as a royal residence. During the last years of the union with Denmark it was used by the viceroys of Norway, and in 1814 by the first king of independent Norway, Christian Frederick.