Salnecke is one of the best preserved 17th century castles in Uppland. The first known owner of Salnecke was a judge Karl Ingeborgasson Lejonbalk. He sold the farm to the Skokloster nunnery in 1302. Later it belonged to Bo Jonsson Grip and the monastery of St. Clare in Stockholm. The monastery was the owner until 1460, when Salnecke fell to archbishop Jons Bengtsson (Oxenstierna).
After Reformation Salnecke became a crown property. Gustav II Adolphus gave the farm to the council Filip Sadler in 1626. After his death in 1641 Salnecke was given to Grissbach. The castle belonged to his family until 1730's. Salnecke was acquired by Klas Samuel Jonas Gyllenadler in the 1830s and it is still in his family's possession.References:
The Externsteine (Extern stones) is a distinctive sandstone rock formation located in the Teutoburg Forest, near the town of Horn-Bad Meinberg. The formation is a tor consisting of several tall, narrow columns of rock which rise abruptly from the surrounding wooded hills. Archaeological excavations have yielded some Upper Paleolithic stone tools dating to about 10,700 BC from 9,600 BC.
In a popular tradition going back to an idea proposed to Hermann Hamelmann in 1564, the Externsteine are identified as a sacred site of the pagan Saxons, and the location of the Irminsul (sacral pillar-like object in German paganism) idol reportedly destroyed by Charlemagne; there is however no archaeological evidence that would confirm the site's use during the relevant period.
The stones were used as the site of a hermitage in the Middle Ages, and by at least the high medieval period were the site of a Christian chapel. The Externsteine relief is a medieval depiction of the Descent from the Cross. It remains controversial whether the site was already used for Christian worship in the 8th to early 10th centuries.
The Externsteine gained prominence when Völkisch and nationalistic scholars took an interest in the late 19th and early 20th centuries. This interest peaked under the Nazi regime, when the Externsteine became a focus of nazi propaganda. Today, they remain a popular tourist destination and also continue to attract Neo-Pagans and Neo-Nazis.