In Bordeaux, vineyards are known by estate, or Chateau. The word in this case does not refer to an actual castle, although there are a few famous vineyards that do have an actual castle somewhere on the premises, and there will often be a picture of one on the label. The Chateau name is more like what we would think of as a brand name. Chateau are allowed to expand and contract by buying or selling land to incorporate into their estate, so they are not a fixed thing. There are more than 3000 different Chateaux in Bordeaux.