Marie Anne de Mailly-Nesle, duchesse de Châteauroux (; 5 October 1717 – 8 December 1744) was the youngest of five famous de Nesle sisters, four of whom would become mistresses of King Louis XV of France. Marie Anne was the King's mistress from 1742 until 1744.

Early life, family and marriage

Marie Anne was born the youngest daughter of Louis de Mailly, Marquis de Nesle et de Mailly, Prince d'Orange (1689 - 1767), and Armande Félice de La Porte Mazarin (1691 - 1729) who had married in 1709. Her mother was the daughter of Paul Jules de La Porte, duc Mazarin et de La Meilleraye (1666 - 1731), the son of the famous adventuress, Hortense Mancini, the niece of Cardinal Mazarin. Her mother was a lady-in-waiting in service to the queen, and her father reportedly "wasted his substance on actresses and the capacious requirements of Court life".Latour, Louis Therese, Princesses Ladies And Salonnieres of The Reign of Louis XV, 1927 Marie Anne had four older full sisters:

Louise Julie de Mailly, Mademoiselle de Mailly, comtesse de Mailly (1710 - 1751), Pauline Félicité de Mailly, Mademoiselle de Nesle, marquise de Vintimille (1712 - 1741), Diane Adélaïde de Mailly, Mademoiselle de Montcavrel, duchesse de Lauraguais (1714 - 1769), Hortense Félicité de Mailly, Mademoiselle de Chalon, marquise de Flavacourt (1715 - 1799).

The only one of the de Nesle sisters not to become a mistress of Louis XV's was the Marquise de Flavacourt. Louise Julie was the first sister to attract the king followed by Pauline Félicité, but it was Marie Anne who was the most successful in manipulating him and becoming politically powerful.

Marie Anne also had a younger half-sister, Henriette de Bourbon (1725 - 1780), Mademoiselle de Verneuil, from her mother's relationship with the duc de Bourbon, the chief minister of Louis XV from 1723 to 1726.

In her youth, Marie Anne was known as Mademoiselle de Monchy. On 19 June 1734, she married Jean Baptiste Louis, marquis de La Tournelle (1708-1740).

She was a friend of Charlotte Aglaé d'Orléans, granddaughter of Louis XIV and Madame de Montespan.

Royal Mistress

Introduction In 1732, Marie Anne's oldest sister Louise Julie, who had succeeded their mother as lady-in-waiting to the queen, caught the attention of King Louis XV, and, with her husband's consent, become a royal mistress. Although she became the king's mistress in 1732, Louise Julie was not officially recognized as his maîtresse en titre until 1738, and did not use her new position at court to enrich herself or to interfere in politics.

Louise Julie was devoted to her family, and it was said that she was "a loving, sincere little creature with all the qualities of an easy dupe, and she was happy to Introduce her sisters at Court for the sole reason that it gave them pleasure". She invited all her sisters to court on different occasions and helped them to establish themselves socially. In 1739, Louise Julie received a letter from her younger sister Pauline-Félicité requesting to be invited to court. Louise Julie granted her sister's wish, but upon her arrival at court, Pauline-Félicité seduced the king and became his mistress.

While Louise Julie remained as the official mistress, the king fell in love with Pauline-Félicité, arranged for her to marry the marquis de Vintimille to enable her to stay at court, and gave her the castle of Choisy-le-Roi as a gift. Madame de Vintimille quickly became pregnant by the king, and died giving birth to his illegitimate son, Louis, the duc de Luc, who looked so much like the king that he was called Demi-Louis ('Small Louis'). Madame de Vintimille's remains stood in Lit de parade in the town of Versailles, when during the night, a mob broke in and mutilated the body of "the king's whore". The king and Madame de Mailly were both devastated by the death of Madame de Vintimille and shocked by the mutilation of her body. It was said that in her despair, Louise Julie performed a Catholic rite of penitence by washing the feet of the poor.

After this, the recently widowed Marie Anne de Mailly, asked Louise Julie for an invitation to court, and successfully established herself socially, becoming a great success based on her beauty and charm. Marie Anne was described as "magnificently beautiful", dignified and graceful, with fair hair, "a complexion so white and pure that it glowed", large blue eyes and red lips with a "childlike smile", and charming wit frequently based on irony.

Struggle with Louise Julie de Mailly Louise Julie de Mailly was known to be so in love with the king that she "could do nothing without asking his advice" and never involved herself with state affairs. This made her acceptable to Cardinal Fleury, a supporter of pacifist policies, but a disappointment to court nobility who wanted the king's mistress to have influence in favor of warfare, which the nobles regarded as necessary for national dignity and glory. The militant aristocrats included duc de Richelieu, and Charles, Prince of Soubise, who both supported the idea of introducing a new mistress to the king in order to oppose the influence of Cardinal Fleury and his pacifist policies. They supported France's engagement in military actions and viewed Louise Julie's sister Marie Anne de Mailly, marquise de La Tournelle, as a suitable candidate for this purpose.

At a masked ball on Shrove Tuesday, 1742, Richelieu led Marie Anne up to the king and introduced them. She herself, however, at first rejected the royal advances. She already had a lover, the young duc d'Agénois, and was not inclined to give him up for the king's sake. As a result, Louis conspired with Richelieu, who was d'Agénois's uncle, to rid himself of the young suitor. Richelieu was quite anxious to do anything to bring about a liaison between the king and Marie Anne de La Tournelle because he knew Louise Julie de Mailly did not view him in a kindly light. The result was that Louis, in imitation of the biblical David, sent his rival to fight the Austrians in Italy. Here, more fortunate than the husband of Bathsheba, the duc d'Agénois was only wounded and returned to the court in glory.

Louis was in despair, but Richelieu, was not one to lightly accept defeat. He sent his nephew to Languedoc, where a woman had been instructed to seduce him. This she did most effectively; letters of a very passionate nature were exchanged; the lady dispatched those which she received to Richelieu, and in due course they were brought to the notice of Marie Anne de La Tournelle, who, furious at her young duke's deceitfulness, turned her attentions to the king and agreed to the suggestion of Richeliu and Soubise.

The fall of Louise Julie de Mailly was orchestrated by means of depriving her of her official office as lady-in-waiting, which was her formal justification for participating in court life and without which she would not formally be allowed to live at court. On 13 September 1742, Amable-Gabrielle de Villars, previously a dame du palais, was promoted to dame d'atour, and there was thereby a vacancy among the ladies-in-waiting of the queen. The recently deceased Françoise de Mazarin, a personal friend of the queen, had shortly before her death wished for a post for her favorite step-granddaughter Marie Anne de Mailly, in order to embarrass Louise Julie de Mailly, whom she detested, and the queen herself asked for the vacant place to be given to Marie Anne de Mailly,Clarissa Campbell Orr: Queenship in Europe 1660-1815: The Role of the Consort. Cambridge University Press (2004) and by the mediation of d'Argenson, Marie Anne secured the king's approval for her candidacy to this office as dame du palais. In parallel, Marie Anne persuaded Louise Julie to write to Cardinal Fleury and resign her own post as dame de palais in favor of their sister Flavacourt by convincing her that the king wished to favor her sisters for the sake of Louise Julie. She agreed, though she resigned on condition that she be compensated with the post of dame d'atours at the court of the next dauphine. When Cardinal Fleury received her request of resignation, he called upon her and warned her about the danger it would mean to her position, and Jean-Frédéric Phélypeaux, Count of Maurepas warned her: "Madame, you do not know your sister, de la Tournelle; when you hand over your office to her, you may expect your dismissal from Court". Louise Julie, however, refused to suspect her sisters for plotting against her or to retract her resignation, and after her resignation was accepted, she accompanied her sisters Marie Anne de Mailly and Flavacourt to the king and queen to offer the gratitude of herself and her sisters for their new appointments. Although the queen retracted her approval, Marie Anne was appointed to the position on 19 September, and the next day, Cardinal Fleury refused Louise Julie's compensatory future post as dame d'atours of the dauphine. Marie Anne had thereby secured a place for herself at court, and deprived Louise Julie of hers.

After her resignation as lady-in-waiting, the court stopped giving Louise Julie attention and instead turned it to her sister and expected successor Marie Anne de Mailly, whom Louis XV himself started to court openly. However, Marie Anne de Mailly was not in love with Louis, and she presented him with conditions before she agreed to consent to be his mistress. She refused intercourse until he had proved his love by agreeing to provide her with the title of duchess, together with a settled income sufficient to enable her to maintain that dignity and safeguard herself against any reversal of fortune; a house "as sumptuous as Madame de Montespan's had been", where she would be able to entertain the king in accordance with royal standards; an assurance that any children born of the union would be provided for and legitimized; to be properly courted before consent, and the dismissal of her sister, his official mistress, from court, and she herself officially acknowledged in her place.

This was a new experience for the king, whose previous sexual partners had never demanded that he court them in any way or made any terms, but he was successfully stimulated to court her by Richelieu, who compared her favorably to his previous lover and presented Marie Anne as a royal mistress to be proud of. The king's courting of the reluctant Marie Anne before the royal court attracted attention, and a song was hummed at court and in town, portraying the lovesick king and his attempts to convince the cold Marie Anne to become his mistress. The king reportedly fell passionately in love with her, but she refused to answer his letters and acted coldly. During his courting of Marie Anne, he reportedly treated Louise Julie more and more coldly, sitting in silence through their meals, talking to her only about his hopes to seduce her sister, causing her to cry. Repeatedly, scenes occurred during which he asked Louise Julie to leave court, after which she fell to his feet and begged him to be allowed to stay, upon which he would allow her a couple of days more.