Seventh Crusade
Foucault's PendulumThe Seventh Crusade is presented as Louis IX’s renewed attempt to recover the Holy Land through an invasion of Egypt—and as a campaign in which religious conviction, military ambition, and the Templars’ need to justify their existence converge in disaster. Its course from the successful landing at Damietta to the defeat near Mansura reveals how quickly a crusade framed as sacred duty could be undone by hesitation, disobedience, and the pursuit of personal glory.
Background and Purpose
The crusade follows generations of failed efforts to preserve Christian rule in the Holy Land. After Jerusalem’s final fall in 1244, the campaign that had begun a century and a half earlier appeared lost. The narrator imagines the Templars, in the melancholy of their diminished prospects, listening to the hidden doctrines of Muslim mystics; the order’s later legends of concealed and unused power grow, in this account, from the frustration of a failed historical purpose.
Louis IX nevertheless remained committed to another crusade. The Templars followed him because the expedition offered a way to affirm the ideal for which they had been formed: without a crusade, the narrator observes, it was difficult for them to justify the Temple. Their willingness to serve the king was not evidence that they shared his confidence in the enterprise. They had been trained to embody an ideal of knighthood, and the expedition demanded that they perform that identity even when its strategic direction seemed doubtful.
Landing at Damietta and the March Toward Cairo
Louis attacked Damietta from the sea. Although the opposing shore appeared heavily defended, he chose to land rather than wait, presenting the decision to his followers as a test of unity and faith. The landing succeeded, and the opposing forces abandoned the city. Louis then delayed entering it because he feared treachery, though the city was available to him; once he took possession, he converted its mosques into churches.
The next decision—whether to move toward Alexandria or Cairo—placed military prudence against ambition. Alexandria offered the wiser strategic objective because taking it would deprive Egypt of an important port. Robert d’Artois instead urged an advance on Cairo, the heart of the country. The Templars, initially cautious, became eager for action. Although Louis had ordered his army to avoid isolated engagements, the marshal of the Temple broke that instruction after spotting a force of Mamelukes. The order’s eagerness to prove itself thus helped turn a campaign already pulled toward glory into an increasingly hazardous pursuit.
Mansura and the Defeat
The Saracens entrenched themselves across the river near Mansura. The French attempted to construct a dam and ford, defending the work with mobile towers, while the opposing forces used Greek fire, which could illuminate the Christian camp at night. During the fighting, a Bedouin guide led Louis and his men to a ford in return for three hundred bezants. The river crossing cost lives, and mounted Saracens waited on the far bank.
The Templars formed the vanguard, followed by Robert d’Artois. When the opposing horsemen withdrew, Artois pursued them instead of waiting for the rest of the army. The Templars joined the attack to avoid dishonor and reached Artois after he had entered the enemy camp. He pressed on toward Mansura despite the Templars’ attempts to restrain him. His accusations—that the Templars and Hospitalers had failed to conquer the territory through lack of courage—made restraint still harder: the knights were challenged to prove that they were second to none.
The Templars charged into the city and pursued the enemy to its far wall. They then recognized a repetition of the mistake made at Ascalon: while the Christians were occupied with plunder, the opposing force regrouped and attacked the disorganized men. The narrator raises, without resolving, the possibility that greed had again blinded the Templars. Brother Gilles, commander of the Temple, is said to have warned Artois that the knights would follow him despite their doubts that they would return. Artois was killed, as were many other knights, including two hundred and eighty Templars.
Collapse and Aftermath
The defeat at Mansura was not the campaign’s only disaster. Guillaume de Sonnac, Grand Master of the Templars, died after being caught in Greek fire. The Christian army suffered from a shortage of provisions and scurvy, and Louis’s forces were eventually routed. The king himself was severely ill with dysentery. Damietta was lost, and the queen negotiated his ransom for five hundred thousand livres tournois.
On Louis’s return to Saint-Jean-d’Acre, the city welcomed him in a procession, and he was treated as a victor despite the failed campaign. The Templars meanwhile tried to negotiate with Damascus. When Louis learned of their effort, he publicly repudiated the new Grand Master before Muslim ambassadors and compelled him to withdraw his promises and ask the king’s pardon. The episode shows that military service did not protect the order from royal humiliation: even after fighting for the king, the Templars remained subject to his authority.
The wider outcome made the campaign’s failure more consequential. In 1291, Saint-Jean-d’Acre fell, and the Christian kingdom of Jerusalem disappeared. The Templars survived as a wealthy and powerful order, but the Holy Land for which they had been created was no longer theirs to defend. In the narrative, the Seventh Crusade therefore marks not a decisive recovery but a stark contradiction: the knights fulfilled their vocation at terrible cost, yet the wars that could have sustained that vocation ended without restoring its original world.