Louis the Pious

Louis the Pious: The Emperor Who Legislated Against Chaos

On Maundy Thursday, 9 April 817, the wooden gallery joining Aachen's cathedral to the palace gave way beneath the emperor and his court. Men died in the rubble. Louis walked out of it and read the accident as a summons. Within three months he had issued an eighteen-chapter decree that tried to solve, in advance and on parchment, the problem that had destroyed every Frankish dynasty before his.

The Boy King of Aquitaine

He was born in 778 at Cassinogilum, probably Chasseneuil near Poitiers, while his father Charlemagne campaigned across the Pyrenees, the third son of Charlemagne and Hildegard and twin to a brother, Lothair, who died young. Both boys were given old Merovingian names, a gesture asserting continuity with the dynasty the Carolingians had displaced.

At three he was crowned King of Aquitaine and sent south with regents, because Charlemagne intended each son to grow up in the region he was to rule and absorb its customs. Louis absorbed rather more: a clerical education of high quality, and a taste for religious asceticism that never left him. He also learned to fight, taking Barcelona from the Emirate of Córdoba in 801 after a seven-month siege.

Dynastic accident did the rest. Pepin died in 810, Charles the Younger in 811, and Louis was suddenly the only legitimate heir standing. On 11 September 813 the dying Charlemagne crowned him co-emperor at Aachen. When news of his father's death reached him at Doué in Anjou that January, Louis rode for Aachen and crowned himself again, to shouts of *Vivat Imperator Ludovicus*.

The Purge

What followed was less a succession than a moral cleansing. Louis destroyed the collection of old Germanic pagan tokens and texts his father had assembled, drove out courtiers whose conduct he found suspect, banished the palace women, and packed unmarried female relatives into convents so no rival could marry into the family. Charlemagne's cousins Adalard and Wala were forced into monastic exile. In their place rose Bernard of Septimania and Ebbo, a former serf whom Louis had raised to the archbishopric of Reims.

The point was not vengeance but standardization. Louis handed the Frankish church to Benedict of Aniane, a Septimanian Visigoth installed as abbot of the new monastery at Inden beside the palace, with a mandate to make every religious house in the empire follow the Rule of Saint Benedict. Councils at Aachen in 816 and 817 produced the *Canones* and the *Capitulare institutum*, imposing common life on cathedral chapters and strict Benedictine observance on the monasteries.

Ordinatio Imperii

The 817 decree, known to modern historians as the *Ordinatio Imperii* though the contemporary manuscript calls it a *divisio imperii*, tried to have it both ways. Lothair was proclaimed co-emperor and overlord of his brothers; Pepin received Aquitaine, Louis the German received Bavaria and its marches. Every son got a kingdom, yet the empire itself was declared indivisible and the emperor supreme.

The document had one fatal omission. Bernard, son of Pepin and King of Italy since 813, appeared nowhere in it. He conspired, surrendered at Chalon-sur-Saône on invitation, and was condemned to death at Aachen for treason. Louis commuted the sentence to blinding. Bernard died after two days of agony. Theodulf of Orléans, caught in the affair, was shut in a monastery and died there, rumoured poisoned. The nephew's death marked Louis's conscience for the rest of his life.

Penance as Statecraft

At his palace of Attigny in the Ardennes, before Pope Paschal I and an assembly of clerics and nobles, Louis publicly performed penance for Bernard's death, in part emulating Theodosius I. He reconciled with his illegitimate half-brothers, making Drogo Bishop of Metz, and released Wala and Adalard from confinement — which proved catastrophic. The penance cost him more. He recited a list of minor offences no secular ruler of the age would have troubled to mention, and his prestige fell accordingly. Here was the paradox of his rule: the sincerity that made him a great patron of the church made him legible as weak to the aristocracy he governed.

The Wars of the Sons

Ermengarde of Hesbaye, his first wife, died in 818; Louis took it as divine retribution. In 820 he married Judith, daughter of Count Welf of Altdorf, and in 823 she bore him Charles, later called the Bald. A fourth heir wrecked the arithmetic of 817. At Worms in 829 Louis carved Alemannia out for Charles, and Lothair's promised share shrank.

Revolt followed twice. In 830, with Wala urging him on, Lothair accused Judith of adultery with Bernard of Septimania and of passing off Charles as Bernard's son. Pepin marched Gascons on Paris, the emperor was seized at Compiègne and Judith imprisoned at Poitiers. Louis bought his sons back with promises of larger inheritances and was restored in 831.

The second collapse was worse. In 833 Lothair brought Pope Gregory IV to the plains of the Rothfeld, and Louis's army melted away. He dismissed the handful who remained, saying it would be a pity if any man lost life or limb on his account; the place has been called the Field of Lies ever since. On 13 November, at the church of Saint Medard in Soissons, Ebbo and Agobard of Lyon presided as the emperor confessed to oath-breaking and failure to control an adulterous wife, threw his sword belt down at the altar and was declared unfit ever to hold office. The anonymous *Vita Hludovici* protested that God does not judge twice for sins already confessed.

He came back. Rabanus Maurus, his half-brother Drogo and Judith's sister Emma engineered his restoration on 1 March 834, and at Thionville the following February he was reinvested with the ancestral garb and the crown. He spent his last years fighting Vikings who sacked Dorestad twice and fighting his sons again, and died on 20 June 840 on a Rhine island near Ingelheim, in Drogo's arms, pardoning Louis the German and proclaiming Lothair emperor.

Why Louis Is Called a Genius

The honest answer is that almost nobody has, and the sources reviewed here never use the word. He is generally compared unfavourably to his father, and his succession schemes are judged to have proved unworkable. If the term is defensible at all, it is for an unusual kind of mind: a legislative, systematizing intelligence that tried to convert a personal empire into an institution.

The *Ordinatio Imperii* is an attempt to think a century ahead — to write contingency clauses for deaths that had not happened, to make imperial unity survive Frankish partible inheritance by decree. No one before him had tried it. The Aachen councils were comparably abstract: they took the wildly various monastic practice of a continent and imposed one rule on it, and that reform outlasted the empire itself. He extended his father's intellectual revival through monastic schools such as Fulda, and his was the longest reign of any medieval emperor until Henry IV.

The counter-case is severe. He blinded his own nephew to death. He handed his enemies a weapon by confessing publicly to sins nobody had asked him to confess, never grasping that in a warrior aristocracy contrition read as incapacity. His succession plan was undone within six years by the fact of another son. Britannica calls his reign a central and controversial stage in the Carolingian experiment — fairer than either hagiography or contempt. He was no genius of command, but something rarer: a ruler who believed a written constitution could bind the future.

Legacy

The empire he tried to hold together was cut into three at Verdun in 843, and the borders drawn there shadow European politics still. His religious settlement fared better than his political one: the Benedictine uniformity imposed under his authority shaped Western monasticism for centuries. Louis is remembered as the man who could not keep Charlemagne's inheritance intact — less often as the man who asked, first and hardest, what an empire becomes once the conqueror is dead.

Achievements

• duke of Bavaria
• king of Franks (814–840)
• Carolingian Roman emperor (814–840)