Louis IX of France

Louis IX led the Seventh Crusade to Egypt, capturing Damietta in 1249. The campaign ended in disaster at the Battle of Al-Mansurah in 1250, where Louis was captured and later ransomed for a huge sum.

Louis IX implemented judicial and administrative reforms in France, including the establishment of the Parlement of Paris and the prohibition of private warfare. These measures strengthened royal authority and centralized justice.

Louis IX signed the Treaty of Paris with Henry III of England, ending the conflict between the Capetian and Plantagenet dynasties. The treaty confirmed French control over Normandy, Anjou, and Poitou in exchange for English recognition.

Louis IX launched the Eighth Crusade, targeting Tunis in North Africa. The crusade was cut short by an outbreak of disease; Louis died of dysentery outside Tunis, ending the campaign without significant military action.