Lucheux Castle was built in 1120 by Hugh II, Count of Saint-Pol who used techniques taken back from the crusades he had been on. Situated on the border of Artois and Picardy it was one of the most important strongholds in the region. It continued to grow during the Middle Ages. Count Guy III of Saint-Pol altered the castle with four corner towers, hall and chapel in 1275. The castle was attacked by English army during Hundred Years' War several times.
In 1522 the imperial troops of Charles V besieged Lucheux castle for eight days and in 1552 Spanish army attacked it. Protestants took it into their possession in 1567 and the final siege occured in 1594-1595 by Spanish army again. They destoyed the castle and it was finally demolished by the order of cardinal Richelieu in 1640.
Today the massive gate and some walls remain.
Rosenborg Palace was built in the period 1606-34 as Christian IV’s summerhouse just outside the ramparts of Copenhagen. Christian IV was very fond of the palace and often stayed at the castle when he resided in Copenhagen, and it was here that he died in 1648. After his death, the palace passed to his son King Frederik III, who together with his queen, Sophie Amalie, carried out several types of modernisation.
The last king who used the place as a residence was Frederik IV, and around 1720, Rosenborg was abandoned in favor of Frederiksborg Palace.Through the 1700s, considerable art treasures were collected at Rosenborg Castle, among other things items from the estates of deceased royalty and from Christiansborg after the fire there in 1794.
Soon the idea of a museum arose, and that was realised in 1833, which is The Royal Danish Collection’s official year of establishment.