This beautiful church is an impressive but understated medieval stone cathedral dating from approximately 1125; it was extensively renovated following a fire in 1272 and contains traces of Gothic, baroque, Romanesque and Anglo-Norman influences. Despite restoration in the 1860s and in 1940, and the stripping of some features during the Reformation, the cathedral is, by some accounts, Norway's oldest medieval cathedral still in its original form.

　　Its interior, with wonderful stone columns, tapestries, elaborate baroque pulpit and stained-glass window depicting the main events of the Christian calendar, is moving.