Stenhammar is a palace and mansion located outside Flen in Södermanland County. The property has been known to exist since the 1300s. The estate was, in the late Middle Ages, developed by Laurens Birgersson and his sons. In the 16th century it was sold to Jöns Arp, a member of the royal council of that time. Through his daughter Carin’s marriage the estate came to the Rosenhane family. It was this family who erected the palace building we can see today.
The main building consists of two floors with several towers and was erected in 1658 after drawings by Jean de la Vallée and got its present appearance in the mid-19th century by architect Abraham Nyström. Parts of the facade were renovated in 2003. In addition to the main building itself, there is a large property portfolio of about 150 buildings.
Stenhammar is owned by the State and it has been leased to King Carl XVI Gustaf since 1966, but is not considered a crown palace. The previous leaseholder was Prince Wilhelm, Duke of Södermanland (younger brother of the Kings' paternal grandfather) who lived there and held it until his death. Stenhammar was donated to the State by landowner and courtier Robert von Kræmer in 1903, and the will stipulates that it should be leased out to a Prince of the Royal House, preferably a Duke of Södermanland, if there is one.
References:Ehrenbreitstein Fortress was built as the backbone of the regional fortification system, Festung Koblenz, by Prussia between 1817 and 1832 and guarded the middle Rhine region, an area that had been invaded by French troops repeatedly before. The fortress was never attacked.
Early fortifications at the site can be dated back to about 1000 BC. At about AD 1000 Ehrenbert erected a castle. The Archbishops of Trier expanded it with a supporting castle Burg Helferstein and guarded the Holy Tunic in it from 1657 to 1794. Successive Archbishops used the castle's strategic importance to barter between contending powers; thus in 1672 at the outset of war between France and Germany the Archbishop refused requests both from the envoys of Louis XIV and from Brandenburg's Ambassador, Christoph Caspar von Blumenthal, to permit the passage of troops across the Rhine.