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Who was Margaret of Provence and when did she marry Louis IX?

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Margaret of Provence (1221–1295) was the eldest daughter of Raymond Berengar IV, the count of Provence. She married Louis IX of France on May 27, 1234.1

This marriage was arranged by Louis IX’s mother, Blanche of Castile, and served to extend French authority beyond the Rhône. Throughout their marriage, Margaret demonstrated significant courage, notably accompanying her husband on the crusade of 1248 and supporting the crusaders following the defeat at al-Manṣūrah.1