Louis IX of France

Louis IX (25 April 1214 – 25 August 1270), also known as Saint Louis, was King of France from 1226 until his death in 1270. He is widely recognized as the most distinguished of the Direct Capetians. Following the death of his father, Louis VIII, he was crowned in Reims at the age of 12. His mother, Blanche of Castile, effectively ruled the kingdom as regent until he came of age, and continued to serve as his trusted adviser until her death. During his formative years, Blanche successfully confronted rebellious vassals and championed the Capetian cause in the Albigensian Crusade, which had been ongoing for the past two decades.

As an adult, Louis IX grappled with persistent conflicts involving some of the most influential nobles in his kingdom, including Hugh X of Lusignan and Peter I of Brittany. Concurrently, England's Henry III sought to reclaim the Angevin continental holdings, only to be decisively defeated at the Battle of Taillebourg. Louis expanded his territory by annexing several provinces, including parts of Aquitaine, Maine, and Provence. Keeping a promise he made while praying for recovery from a grave illness, Louis led the ill-fated Seventh and Eighth Crusades against the Muslim dynasties that controlled North Africa, Egypt, and the Holy Land. He was captured and ransomed during the Seventh Crusade, and later succumbed to dysentery during the Eighth Crusade. His son, Philip III, succeeded him.

Louis instigated significant reforms in the French legal system, creating a royal justice mechanism that allowed petitioners to appeal judgments directly to the monarch. He abolished trials by ordeal, endeavored to terminate private wars, and incorporated the presumption of innocence into criminal proceedings. To implement his new legal framework, he established the offices of provosts and bailiffs. Louis IX's reign is often marked as an economic and political zenith for medieval France, and he held immense respect throughout Christendom. His reputation as a fair and judicious ruler led to his being solicited to mediate disputes beyond his own kingdom. Louis IX expanded upon the work of his predecessors, especially his grandfather Philip II of France and reformed the administrative institutions of the French crown. He re-introduced, and expanded the scope of, the enquêtes commissioned to investigate governmental abuses and provide monetary restitutions for the crown.

Louis's admirers through the centuries have celebrated him as the quintessential Christian monarch. His skill as a knight and engaging manner with the public contributed to his popularity. Saint Louis was extremely pious, earning the moniker of a "monk king". Louis was a staunch Christian and rigorously enforced Catholic orthodoxy. He enacted harsh laws against blasphemy, and he also launched actions against France's Jewish population, including ordering them to wear a yellow badge of shame, as well as the notorious burning of the Talmud following the Disputation of Paris. Louis IX holds the distinction of being the sole canonized king of France and is also the direct ancestor of all subsequent French kings.

Much of what is known of Louis's life comes from Jean de Joinville's famous Life of Saint Louis. Joinville was a close friend, confidant, and counselor to the king. He participated as a witness in the papal inquest into Louis's life that resulted in his canonization in 1297 by Pope Boniface VIII. Two other important biographies were written by the king's confessor, Geoffrey of Beaulieu, and his chaplain, William of Chartres. While several individuals wrote biographies in the decades following the king's death, only Jean of Joinville, Geoffrey of Beaulieu, and William of Chartres wrote from personal knowledge of the king and of the events they describe, and all three are biased favorably to the king. The fourth important source of information is William of Saint-Parthus's 19th-century biography, which he wrote using material from the papal inquest mentioned above.

Louis was born on 25 April 1214 at Poissy, near Paris, the son of then-Prince Louis "the Lion" (later Louis VIII of France) and Blanche of Castile,, during the reign of his paternal grandfather, Philip II "Augustus" of France, and was baptized in Poissy in La Collégiale Notre-Dame church. His maternal grandfather was King Alfonso VIII of Castile. Tutors of Blanche's choosing taught him Latin, public speaking, writing, military arts, and government. His father succeeded to the throne upon Philip II's death in 1223, when then-Prince Louis was nine years old.

Louis was 12 years old when his father died on 8 November 1226. His coronation as king took place on 29 November 1226 at Reims Cathedral, officiated by the bishop of Soissons. Louis's mother, Queen Blanche, ruled France as regent during his minority. Louis's mother instilled in him her devout Christianity. She is once recorded to have said:

I love you, my dear son, as much as a mother can love her child; but I would rather see you dead at my feet than that you should ever commit a mortal sin.