The Kavilda stronghold (Kawelecht) was, according to Leonhard von Stryk, first built in 1354 by Bartholomäus von Tiesenhausen. Other sources say it was built in 1361 by Arnold von Vietinghoff, the Master of Livonian Order. The castle was destroyed during the Livonian War somewhere between 1564 and 1582. It was probably knocked down before the invasion of the Poles. Thereinafter Kavilda excisted only as a manor but not as a castle.
The castel was a castellum-like building with a tower-shaped residential building. Nowadays only one and a half floors have remained, most of it under the ground.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.