The Hallwyl Palace was built 1893-1898 to the design of Isak Gustaf Clason for Count Walther von Hallwyl and his wife Wilhelmina. It was created to accommodate the office of the count and the extensive art collection of the countess. While the exterior of the building and the court is historical in style — borrowing architectonic elements from medieval prototypes and Renaissance Venice — it was technically utterly modern on its completion — including electricity, central heating, telephones, and bathrooms, while the elevator was a later addition.
The countess collected her artworks during her worldwide journeys in order to found a museum, and, consequently, the palace was donated to the Swedish State in 1920, a decade before her death. The collection encompasses some 50,000 objects, and the museum is still open to the public.
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.