In her youth, she visited the Abbey of Santa María la Real de Las Huelgas, founded by her parents, several times. In consequence of the Treaty of Le Goulet between Philip Augustus and John of England, Blanche's sister,

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Eleanor of Aquitaine judged that Urraca, Blanche's sister, was more beautiful than Blanche, although Catherine Hanley states we have no knowledge what Blanche looked like.

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On 22 May 1200 the treaty was finally signed, John ceding along with his niece the fiefs of Issoudun and Graçay, together with those that

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Philip died in July 1223, and Louis VIII and Blanche were crowned on August 6. Upon Louis' death in November 1226 from dysentery, he left Blanche, by then 38, regentand guardian of his children. Of her twelve or thirteen children, six had died, and Louis, the heir —

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In 1248, Blanche again became regent, during Louis IX's absence on the Crusade, a project which she had strongly opposed. In the disasters which followed she maintained peace, while draining the land of men and money to aid her son in the East. She fell ill at

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Blanche was a patron of the arts and owned a variety of books, both in French and in Latin. Some of these were meant as teaching tools for her son. Le Miroir de l'Ame was dedicated to Blanche. It instructs queens to rigorously practice Christian virtues in daily

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In 1233, Raymond of Toulouse was starting to chafe under the terms of the treaty of Paris, and so Blanche sent one of her knights, Giles of Flagy, to convince him to cooperate. Blanche had also heard through troubadours of the beauty, grace, and religious devotion of

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