Snizort Cathedral was founded under the authority of the Archbishop of Nidaros (Trondheim) in Norway. Amongst its more famous bishops was Wimund, who according to William of Newburgh became a seafaring warlord adventurer in the years after 1147.
According to tradition, the cathedral was founded near a site where Columba had preached from a rock, which later became known as St. Columba's rock. The site may originally have been a pagan Pictish centre, but by the time of Columba's arrival may have converted to a Pictish Christian establishment. Over the early centuries of the 2nd Millennium it gained importance as the Kilmuir monastery declined and by the 14th Century was referred to as the Metropolitan Church of the Isles, being the principal seat for the Bishops of the Isles until power was transferred to Iona Abbey. It was extant until at least 1501, but destroyed during the Scottish reformation, although remains are still visible.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.