Blanche of Castile (Spanish: Blanca de Castilla; French: Blanche de Castille; 4 March 1188 – 27 November 1252) was Queen of France by marriage to Louis VIII. She acted as regent twice during the reign of her son, Louis IX: during his minority from 1226 until 1234, and during his absence from 1248 until 1252.
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