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In page Marie of Valois, Prioress of Poissy:

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In 1405, when she was twelve years old, her mother Queen Isabeau and her paternal uncle Louis I, Duke of Orléans visited her to try and convince her to abandon religious life and marry twenty-eight-years-old Edward, Marquis of Pont-à-Mousson (1377–1415), oldest living son and heir of Robert, Duke of Bar, who was an ally of the duke and first cousin to her father. She refused to do this, saying that only the king, who was at the time mentally unstable, had the power to force her to marry.[1] Remaining at the convent, she took her final vows on 26 May 1408 and spent her life there. Later, she became the prioress of the convent. Marie died of bubonic plague on 19 August 1438, a few days short of her forty-fifth birthday and was buried at the convent.[citation needed]