Eleanor of Aquitaine was Queen of France from 1137 to 1152 as the wife of King Louis VII, Queen of England from 1154 to 1189 as the wife of King Henry II, and Duchess of Aquitaine in her own right from 1137 until her death in 1204.

As the heiress of the House of Poitiers, which controlled much of southwestern France, she was one of the wealthiest and most powerful women in western Europe during the High Middle Ages. She was a patron of poets such as Wace, Benoît de Sainte-Maure, and Bernart de Ventadorn. She was a key leading figure in the unsuccessful Second Crusade.

Eleanor was the daughter of William X, Duke of Aquitaine, and Aénor de Châtellerault.

She became duchess upon her father's death in April 1137, and three months later she married Louis, son of her guardian King Louis VI of France. A few weeks later, Eleanor's father-in-law died and her husband succeeded him as King Louis VII. Eleanor and Louis VII had two daughters, Marie and Alix. Soon afterwards, she sought an annulment of her marriage, but her request was rejected by Pope Eugene III.

 Eventually, Louis agreed to an annulment, as fifteen years of marriage had not produced a son.

 The marriage was annulled on 21 March 1152 on the grounds of consanguinity within the fourth degree. Their daughters were declared legitimate, custody was awarded to Louis, and Eleanor's lands were restored to her.

As soon as the annulment was granted, Eleanor became engaged to her third cousin Henry, Duke of Normandy. The couple married on Whitsun, 18 May 1152. Henry and Eleanor became king and queen of England in 1154. They had five sons and three daughters. However, Henry and Eleanor eventually became estranged. Henry imprisoned her in 1173 for supporting the revolt of their eldest son, Henry the Young King, against him.

She was not released until 6 July 1189, when her husband died and their third son, Richard I, ascended the throne. As queen dowager, Eleanor acted as regent while Richard went on the Third Crusade.

 She lived well into the reign of her youngest son, John.