Born in 995, Olav Haraldsson followed the traditional life of a Viking chieftain from the tender age of 12, “rousing the steel-storm” as the saga writers put it, from Finland to Ireland. He also served as a mercenary to both the duke of Normandy and King Ethelred of England, and it was during this time that he was converted to Christianity. In 1015, he invaded Norway, defeated his enemies and became king, his military success built upon the support of the more prosperous farmers of the Trøndelag, an emergent class of yeomen who were less capricious than the coastal chieftains of Viking fame. However, Olav’s zealous imposition of Christianity – he ordered the desecration of pagan sites and the execution of those who refused baptism – alienated many of his followers and the bribes of Olav’s rival Knut (Canute), king of England and Denmark, did the rest: Olav’s retainers deserted him, and he was forced into exile in 1028. Two years later, he was back in the Trøndelag, but the army he had raised was far too weak to defeat his enemies, and Olav was killed near Trondheim at the Battle of Stiklestad.

Olav might have lost his kingdom, but the nationwide Church he founded had no intention of losing ground. Needing a local saint to consolidate its position, the Church carefully nurtured the myth of Olav, a process of sanctification assisted by the oppressive rule of Olav’s successor, the “foreigner” Knut. After the Battle of Stiklestad, Olav’s body had been spirited away and buried on the banks of the River Nid at what is today Trondheim. There were rumours of miracles in the vicinity of the grave, and when the bishop arrived to investigate these strange goings-on, he exhumed the body and found it, lo and behold, perfectly uncorrupted. Olav was declared a saint, his body placed in a silver casket and when, in 1066, Olav Kyrre, son of Olav’s half-brother Harald the Fair-Haired, became king of Norway, he ordered work to begin on a grand church to house the remains in appropriate style. Over the years the church was altered and enlarged to accommodate the growing bands of medieval pilgrims; it achieved cathedral status in 1152, when Trondheim became the seat of an archbishopric whose authority extended as far as Orkney and the Isle of Man.

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