Britannica Sources used in this answer

Why did Blanche of Castile serve as regent for Louis IX?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

Blanche of Castile served as regent for Louis IX because he was a minor when he ascended to the throne. Following the death of his father, Louis VIII, in 1226, the 12-year-old Louis IX became king. In accordance with her husband’s will, Blanche became both the guardian of the young king and the regent of France.12

Blanche served as regent on two separate occasions:
* 1226–1234: She assumed power immediately upon the death of Louis VIII to secure the young king's position, successfully navigating a rebellion of great barons and establishing domestic stability.1
* 1248–1252: She was entrusted with the kingdom again when Louis IX departed for a crusade against the Muslims.1

Throughout these periods, Blanche acted as a strong leader, diplomat, and negotiator, serving as the primary supporter of her son's kingship until her death.1