Ain el Quassimou or Aïn Kassimou is a villa in Marrakech. It was originally built in the late 19th century for Leo Tolstoy's relative, Olga Tolstoy.[1] In the 1980s, it was purchased by French sports billionaire Patrick Guerrand-Hermès and redeveloped, and is now part of Royal Polo Club de la Palmeraie.