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In page Aristocracy of Norway:

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St Mary's Church was an important political institution until the Reformation era, as it was the seat of government in Norway, although from the late 14th century effectively subordinate to the central government administration in Copenhagen and increasingly concerned only with matters relating to the legal field.[6] Peter Andreas Munch has described the royal clergy as a counterweight to the (regular) secular aristocracy with a stronger loyalty to the king and a stronger service element than both the (regular) secular and the clerical aristocracy.[7] The cathedral chapter of St Mary's Church ceased to exist as a separate institution when it was merged with the chapter of Oslo Cathedral in 1545, although its clergy retained their prebends.