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:House of the Blackheads (Melngalvju nams) is a building situated in the old town of Riga. The original building was erected during the first third of the 14th century for the Brotherhood of Blackheads, a guild for unmarried German merchants in Riga. Major works were done in the years 1580 and 1886, adding most of the ornaments.
The structure was bombed to a ruin by the Germans June 28, 1941 and the remains demolished by the Soviets in 1948. The current reconstruction was erected from 1995 to 1999. Today the House of Blackheads serves as a museum and sometimes concert hall.