The Marquise de Pompadour, born Jeanne Antoinette Poisson in 1721, was a prominent French noblewoman and the official mistress of King Louis XV. She played a significant role in the cultural and political life of France during the 18th century, influencing art, architecture, and fashion. As a patron of the arts, Pompadour supported many artists, including the painter François Boucher and the architect Rococo. She was instrumental in the development of the Rococo style, which emphasized elegance and ornate decoration, leaving a lasting impact on French culture and society.