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 Basilica of Santa Maria in Trastevere is one of the oldest churches of Rome. The basic floor plan and wall structure of the church date back to the 340s, and much of the structure to 1140-43. The first sanctuary was built in 221 and 227 by Pope Callixtus I and later completed by Pope Julius I.
The inscription on the episcopal throne states that this is the first church in Rome dedicated to Mary, mother of Jesus, although some claim that privilege belongs to the Basilica di Santa Maria Maggiore. A Christian house-church was founded here about 220 by Pope Saint Callixtus I (217-222) on the site of the Taberna meritoria, a refuge for retired soldiers. The area was made available for Christian use by Emperor Alexander Severus when he settled a dispute between the Christians and tavern-keepers.
The church underwent two restorations in the fifth and eighth centuries and in 1140-43 it was re-erected on its old foundations under Pope Innocent II.