It may not be surprising that one of the few medieval cathedrals to survive the enthusiastic cultural cleansing of the Reformation would be on a fairly remote island. Unfortunately, many of the relics did not survive as well as the architecture did. Magnus was a pious Norwegian earl, killed by a cousin who later became king. When miracles began shortly after his burial, this martyr was venerated as a saint. In 1137, his nephew—a crusader called Rognvald—successfully lobbied for the construction of this cathedral in honor of his uncle.