Édouard Manet, 1882. Barmaid mirrored behind herself — Manet's last great composition. Courtauld, London.
From Wikipedia
A Bar at the Folies-Bergère is a painting by Édouard Manet, considered to be his last major work. It was painted in 1882 and exhibited at the Paris Salon of that year. It depicts a scene in the Folies Bergère nightclub in Paris. The painting originally belonged to the composer Emmanuel Chabrier, a close friend of Manet, and hung over his piano. It is now in the Courtauld Gallery in London.