Louis VIII the Lion: Southern Conquests and Capetian Succession (1223–1226) · HIGH MIDDLE AGES
The campaign of 1226 exhausts the king. On the journey home, Louis VIII falls ill and dies in November 1226.
His son Louis IX is still a child. This situation tests the Capetian monarchy: in earlier times, fragile power often provoked revolts by princes. Now, the royal state is sufficiently structured to endure.
The regency falls to Blanche of Castile. She governs in the king’s name, maintains the obedience of the great lords, and protects the territorial inheritance. The continuity of power becomes a political challenge in itself: maintaining an enlarged kingdom without an adult king.