Oskar Dieter Alex von Rosenberg-Redé, 3rd Baron von Rosenberg-Redé (4 February 1922 – 8 July 2004), also known as Alexis, Baron de Redé, was a prominent French banker, aristocrat, aesthete, collector, and socialite. In 2003, he was appointed a commandeur of the Ordre des Arts et des Lettres for his restoration of the Hôtel Lambert, where he was known for hosting opulent costume balls. Involved in horse racing, in 1972 he won the Prix de Diane and came in second at the Prix de l'Arc de Triomphe.