Saint-Chapelle, Louis IX, and the Lost Holy Nail

Welcome back to the Age of Cathedrals. This article will delve into the architectural masterpiece of the Saint-Chapelle, a prime example of radiating Gothic style, located on Paris's Île de la Cité.

The Royal Context of Saint-Chapelle

The site of the Saint-Chapelle has a rich history, potentially housing Gallo-Roman and Merovingian castles. Robert the Pious, King of the Franks (996-1031), rebuilt a palace there in the early 11th century. Philip Augustus followed suit in the early 13th century. Philip's grandson, Louis IX (Saint Louis), who reigned from 1226 to 1270, resided between his palace at Vincennes and the palace on the site of the current Palais de Justice, which served as a royal residence until Charles V moved to the Louvre in the 14th century.

These were years of significant expansion for the royal domain:

• Louis VI (died 1137): Modestly increased direct monarchical holdings.
• Louis VII (reigned until 1179): Added little.
• Philip Augustus (Louis VII's son): Tripled the domain's extent, acquiring territories such as Artois, Vermandois, Valois, Picardy, and the counties of Beaumont-sur-Oise and Clermont-en-Beauvaisis to the northeast; the Duchy of Normandy, and the counties of Maine, Évreux, and Alençon to the northwest; Touraine, Anjou, Maine, and part of Poitou to the west; and Berry, Gévaudan, Monts du Velay, and part of Auvergne to the southwest.
• Louis VIII (Philip's son, reigned 1223-1226): Conquered Sancerre, Issoudun, and Péronne in Picardy. His 1226 campaign in the south solidified his rights over Béziers, Carcassonne, Beaucaire, and other towns in Languedoc, granted by Amaury de Montfort.

Despite this expansion, the King of France was still considered "primus inter pares" – a powerful feudal baron, but not qualitatively superior to dukes like those of Normandy, Brittany, or Aquitaine, or the Count of Champagne (the poet Thibaut IV).

The Fragility of Monarchy and the Strength of Blanche of Castile

The monarchy's fragility was evident in the rebellion of barons against Louis IX, who ascended to the throne at the tender age of 12. Among the rebels was Pierre Mauclerc, whose image is seen under the south rose window in Chartres.

However, the rebellious barons had not accounted for Louis's mother, Blanche of Castile, a courageous, savvy, and formidable personality. Blanche successfully maintained the kingdom's stability until Louis reached maturity. She also ruled effectively during her son's long absence during the Fourth Crusade, as recounted in Jean de Joinville's "Life of Saint Louis."

Louis IX: A Muscular Christian and Intellectual King

Louis IX was a devout Christian, and unlike many of his predecessors, he possessed an intellectual curiosity. He knew enough Latin to follow liturgical offices and read passages from St. Augustine's "City of God," a work that deeply influenced him. While he appreciated ideas, he valued belief even more, always prioritizing the latter when the two conflicted.

Lord Jean de Joinville, whose "Life of Saint Louis" is a rich source of information about 13th-century France, recounts an incident where Louis IX, upon hearing of a knight who interrupted a debate between Jews and Christians by striking the Jewish spokesman, declared that a layman, when hearing the Christian religion abused, should defend it not with arguments but with his sword, thrusting it into the scoundrel's belly.

Louis IX, drawing inspiration from Holy Roman Emperors like Charlemagne, recognized the immense power of linking church and state. This alliance, culminating in the "Saint King," would steadily progress until the 18th century with Louis XVI, the Sun King.

The King's Deep Belief and the Holy Nail

Louis IX not only merged altar and crown but also grounded the legitimacy of his realm in both Old and New Testament history. He furthered the participation of French kings in the aura of biblical beginnings, a theme also seen at Chartres. This was not a cynical strategy; Louis IX was profoundly moved by his faith, a conviction evident from his youth and directly leading to the construction of the Saint-Chapelle.

One of Louis's biographers, Guillaume de Saint-Pathus, recounts a significant incident from 1232: the loss of a holy nail from the treasury of Saint-Denis, one of the nails believed to have been used in the crucifixion. This event had profound implications.

Guillaume de Saint-Pathus writes that in 1232, a very holy nail, brought to Saint-Denis during the time of Charles the Bald, fell from its reliquary while being presented to pilgrims for veneration. It was lost amidst the crowd on February 28th.

The sorrow of King Louis and his mother, Queen Blanche, was immense. Upon hearing of the loss of this "exalted treasure," they expressed profound pain, stating that no worse news could have reached them. Louis IX, overwhelmed with grief, cried aloud, declaring he would have preferred the destruction of his best city.

The news spread throughout Paris, causing widespread lamentation. Men, women, children, clerics, and students prayed and wept, rushing to churches to seek divine help. This sorrow extended across the entire realm of France. Many wise individuals believed this "cruel loss" at the beginning of Louis's reign was an omen of great disaster or epidemics, prophesying the destruction of the entire realm.

The renowned French historian Jacques Le Goff notes that 13th-century French people believed in such omens as firmly as Romans believed in consulting the livers of victims or the flight of birds. Incidentally, the holy nail was found a couple of months later.