Mme. de Montespan was of noble birth, being the youngest daughter of Rochechouart, first Duke of Mortemart. She was born in 1641, at the grand old château of Tonnay-Charente, and was educated at the convent of Sainte-Marie. Brought up religiously, she at first evinced a much greater tendency toward religion than toward worldly ambition and vanity. Mme. de Caylus, in her Souvenirs, wrote that "far from being born depraved, the future favorite had a nature inherently disinclined to gallantry and tending to virtue. She was flattered at being mistress, not solely for her own pleasure, but on account of the passion of the king; she believed that she could always make him desire what she had resolved never to grant him. She was in despair at her first pregnancy, consoled herself for the second one, and in all the others carried impudence as far as it could go."

She was known first as Mlle. Tonnay-Charente, and was maid of honor to the Duchess of Orléans. When, at the age of twenty-two, she married the Marquis de Montespan and became lady in waiting to the queen, her beauty, wit, and brilliant conversational powers at once made her the centre of attraction; for several years, however, the king scarcely noticed her. Upon secretly becoming his mistress in 1668 and openly being declared as such two years later, her husband attempted to interfere, and was unceremoniously banished to his estates; in 1676 he was legally separated from her. She persuaded the king to legitimatize their children, who were confided to Mme. Scarron,—afterward Mme. de Maintenon,—who later influenced the king to abandon his mistress.

Mme. de Montespan's power, lasting fourteen years, was almost unlimited, and was the epoch of courtiers intoxicated with passion and consumed by vice, infatuated with the king and his mistress, whose title as maîtresse-en-titre was considered an official one, conferring the same privileges and demanding the same ceremonies and etiquette as did a high court position. The only opposition incurred was from the clergy, who eventually, by uniting their forces with the influence of Mme. de Maintenon, brought about the disgrace of the mistress.

When, in 1675, she desired to perform her Easter duties publicly at Versailles, the priest refused to grant absolution until she should discontinue her wanton, adulterous life. She appealed to the king, and he referred the decision of the matter to Bossuet, who decided that it was an imperative duty to deny absolution to public sinners of notorious lives who refused to abandon them. This was immediately before her legal separation from her husband.

Influenced by the preaching of men like Bourdaloue and Bossuet, the king resolved to abandon his powerful mistress; in 1686 she was finally separated from Louis XIV., but did not leave Versailles until 1691, when, becoming reconciled to her fate, she decided to retire to a convent. Bossuet became her spiritual adviser, and described her habits in the following letter to the king:

"I find Mme. de Montespan sufficiently tranquil. She occupies herself greatly in good works. I see her much affected by the verities I propose to her, which are the same I uttered to your majesty. To her—as to you—I have offered the words by which God commands us to yield our whole hearts to him; they have caused her to shed many tears. May God establish these verities in the depths of the hearts of both of you, in order that so many tears, so much suffering, so many efforts as you have made to subdue yourselves, may not be in vain."

The king did not wholly abandon his mistress; from a material point of view, she was more powerful than ever, for Louis XIV. gave orders to his minister, Colbert, to do for Mme. de Montespan whatever she wished, and her wishes caused a heavy drain upon the treasury. The king continued to pay court to other favorites, such as the Princesse de Soubèse and Mlle. de Fontanges; the latter was his third mistress, but her career was of short duration, as one of the last acts of Mme. de Montespan was, it is said, the poisoning of Mlle. de Fontanges; this, however, is not generally accepted as true, although the Princesse Palatine wrote the following which throws suspicion upon the former favorite: "Mme. de Montespan was a fiend incarnate, but the Fontanges was good and simple. The latter is dead—because, they say, the former put poison in her milk. I do not know whether or not this is true, but what I do know well is that two of the Fontanges's people died, saying publicly that they had been poisoned." With the increasing influence of Mme. de Maintenon, the king completely forgot his former mistress.

Mme. de Montespan was possibly the most arrogant and despotic of all French mistresses and she was, also, the most humiliated. She had inspired no confidence, friendship, love, or respect in Louis XIV., who eventually looked with shame and remorse upon his relations with her. It took her sixteen years to overcome her terrible passion and to give up the court forever. Not until 1691 did she become reconciled to departure from Versailles; thenceforth, penitence conquered immoral desires. M. Saint-Amand says she not only "arrived at remorse, but at macerations, fasts, and haircloths. She limited herself to the coarsest underlinen and wore a belt and garters studded with iron points. She came at last to give all she had to the poor;" she also founded a hospital in which she nursed the sick.

While at the convent, she tried, in vain, to effect a reconciliation with her husband; not until every avenue to a social life was cut off from her, did she entirely surrender herself to charity and the service of God. In her latest years, she was so tormented by the horrors of death that she employed several women whose only occupation was to watch with her at night. She died in 1707, forgotten by the king and all her former associates; Louis XIV. formally prohibited her children, the Duke of Maine, the Comte de Toulouse, the Comte de Vexin, and Mlles. de Nantes, de Blois, and de Tours, from wearing mourning for her.

A striking contrast to Mme. de Montespan in character, disposition, morality, and birth was Mme. de Maintenon, one of the greatest and most important women in French history. What is known of her is so enveloped in calumny and falsehood and made so uncertain by dispute, that to disentangle the actual facts is almost an impossibility, despite the glowing tribute paid to her in the immense work published recently by the Comte d'Haussonville and M. Gabriel Hanotaux.