The Marriage of Eleanor of Aquitaine and…

August 1137 CE

The Marriage of Eleanor of Aquitaine and the Death of Louis VI (1137 CE)

In 1137, William X, Duke of Aquitaine, nearing death, made a decisive move to secure his daughter's inheritance and the future of his duchy. Just before dying, he appointed King Louis VI of France as the guardian of his only child and heir, Eleanor of Aquitaine, and expressed his wish for her to marry the French king’s son.

This arrangement was a stunning political victory for Louis VI, as it presented an opportunity to merge the vast, independent Duchy of Aquitaine with the Capetian royal domains, vastly expanding the power of the French crown.

The Marriage of Eleanor and the Future Louis VII

Eleanor was swiftly married on July 25, 1137, to Prince Louis, the second son of Louis VI and Adelaide of Maurienne.
Louis had only recently become the heir after the accidental death of his older brother, Philip, in 1131.
The union was a political masterstroke, as it theoretically placed Aquitaine under Capetian control, making the French king’s realm far larger and more powerful.

However, the Duchy of Aquitaine remained a semi-independent territory, as Eleanor was still expected to rule her lands separately from the direct administration of the French crown.

The Death of Louis VI and the Ascension of Louis VII

Just days after the wedding, Louis VI succumbed to dysentery, dying on August 1, 1137, at Béthisy-Saint-Pierre, near Senlis and Compiègne.
His death marked the end of a long and successful reign (1108–1137), during which he had consolidated Capetian authority, strengthened the monarchy, and defended against external and internal threats.
His eldest surviving son, Louis VII, ascended to the throne, now ruling alongside Eleanor, whose inheritance made the Capetian dynasty vastly wealthier and more influential.

The Significance of the Union

The marriage of Eleanor and Louis VII created the largest territorial expansion of Capetian power to date, at least on paper.
However, the independence of Aquitaine’s nobility and Eleanor’s strong-willed personality would eventually strain the union, leading to long-term consequences for France.
Eleanor’s remarkable life, including her eventual divorce from Louis VII and later marriage to Henry II of England, would dramatically reshape the political map of France and England for generations.

Though Louis VI died before he could witness the full effects of the union, his strategic marriage alliance with Aquitaine represented one of his greatest political achievements, securing Capetian dominance in France—at least for a time.