Jeanne Antoinette Poisson, Marquise de Pompadour, also known as Madame de Pompadour, was a member of the French court and was the official chief mistress of Louis XV from 1745 to 1751, when she then became and remained a close friend and confidant to the king until her death. She took charge of the king’s schedule and was a valued aide and advisor, despite her frail health and many political enemies. She secured titles of nobility for herself and her relatives, and built a network of clients and supporters. She was particularly careful not to alienate the Queen, Marie Leszczyńska. On February 8, 1756, the Marquise de Pompadour was named as the thirteenth lady in waiting to the queen, a position considered the most prestigious at the court, which accorded her with honors. She was a major patron of architecture and decorative arts, such as porcelain. She was a patron of the philosophes of the Enlightenment, including Voltaire. Hostile critics at the time generally tarred her as a malevolent political influence, but historians are more favorable, emphasizing her successes as a patron of the arts and a champion of French pride.

https://en.wikipedia.org/wiki/Madame_de_Pompadour