The Rånäs manor (or Rånäs castle) was built in the 1850s by the Reuterskiöld family at the site of a 17th century manor, torn down after the completion of the present manor. Rånäs manor was designed by the leading architect of the time, professor Per Axel Nyström. Rånäs manor had a charter from 1774 for the yearly production of 1500 ship pounds (260,000 kg) of bar iron. In the fields surrounding the manor grain was cultivated and in its wide-stretched forests coal was bunkered. The manor also included a long low row of houses for the families of the workers employed at the manor, a position which was considered lifelong.
Following the 1932 Krueger Crash the manor was sold to the Municipality of Stockholm and used as a mental hospital until 1985. In 1996 the manor was bought by two private individuals and extensively restored. Since 1998 Rånäs Manor has been a hotel and conference center.
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.