The reason for the triple-crown symbol is unknown, but it was associated with other pre-Norman kings, with the seal of Magnus II of Sweden, with the relics of the Three Wise Men in Cologne (which led to the three crowns in the seal of the University of Cologne), and with the grants of Edward I of England to towns which were symbolized by three crowns in the towns' arms.
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The blazon of the chief's armoiral shield is Azure, three antique crowns Or and corresponds to one of the attributed arms of the legendary King Arthur.