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In page Margaret of York:

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Margaret's donation of the crown to Aachen spared it the fate of much royal regalia in the English Civil War which saw the destruction of all the main English Crown Jewels. It thus remains one of only two medieval royal English crowns still surviving, the other being the Crown of Princess Blanche, now in the Munich Residenz in Germany. Margaret's crown can still be seen in the Aachen Cathedral Treasury.[citation needed]