Occupied from the 12th century by the Pelet family, originally from the Narbonnais region, Bostfranchet is the cradle of the Beaufranchet (or Pelet de Beaufranchet) family. A manor house there was fortified under Charles I, Duke of Bourbon; walls, fortified towers and ditches were built. All that remains now is a ruined tower of the castle. A farm occupies the main space. The arms of the Beaufranchet family can be seen carved into a stone well in the central courtyard.