Glienicke Palace was designed by Karl Friedrich Schinkel for Prince Carl of Prussia in 1826, The building, originally merely a cottage, was turned into a summer palace in the late classical style. Particularly striking are two golden lion statues in front of the frontage, which were also designed by Schinkel. The lions are versions of the Medici lions from the Villa Medici. In the palace are antique objets d'art, which the Prince brought back from his trips. The palace's park is now called the Volkspark Glienicke. The palace and park are UNESCO World Heritage sites as part of the Palaces and Parks of Potsdam and Berlin since 1990.
References: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.