Jeanne Antoinette Poisson, Marquise de Pompadour, better known as Madame de Pompadour, or Reinette (29 December 1721 – 15 April 1764), was a member of the French royal court and the official chief mistress of Louis XV from 1745 to her death.
In 1749, Pompadour accompanied Louis on a trip to Le Havre, since she wished to see the ocean. As predicted by local businesswoman and Templar Magdelaine Lévesque, the visit proved disastrous for the city's economy.
That same year, Jean Henri Latude sent Pompadour a vial of poison, followed by a letter warning her of the poison. Having invented a false conspiracy against her, Latude intended to use this to gain favor with Pompadour and receive a payment for warning her. Instead, she had him imprisoned.
In 1750, Louis founded the École Militaire, a complex of buildings meant to be used for educating boys from poor families in military matters. Pompadour was the primary overseer and sponsor of the project. In a letter, Louis wrote to her: "I have approved the project since you absolutely want it, my beloved."