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:Sigmaringen Castle was first mentioned in the year 1077 in the chronicles of Petershausen monastery. The oldest parts of the castle are concealed beneath the alterations made during the 17th and the 19th centuries. The secret of the earliest settlement built on this defendable rock will never be fully revealed: large-scale excavation work would be necessary, which the extensive land development renders impossible. Judging from the many Roman remains unearthed in the area around Sigmaringen, the 12th century keep known as the 'Roman Tower' could be traced back to a Roman predecessor.
The castle remains that have been preserved (gate, great hall and keep) date back to the Staufer period around 1200. The castle remains were integrated into subsequent buildings. The foundations of the castle buildings are to a large extent identical to the surrounding castle wall.
These remains give us a good idea of how the castle might have looked during the 12th century.