Jeanne Antoinette Poisson , Marquise de Pompadour , also known as Madame de Pompadour ( 29 December 1721 -- 15 April 1764 , ) , was a member of the French court and was the official chief mistress of Louis XV from 1745 to her death .
Jeanne Antoinette Poisson was better known as Madame de Pompadour . The Marquise de Pompadour ( 29 December 1721 -- 15 April 1764 ) was courtier and the official chief mistress of Louis XV from 1745 until her death .