Chateau Pichon Longueville Baron or Chateau Longueville au Baron de Pichon-Longueville (commonly referred to as Pichon Baron) is a winery in the Pauillac appellation of the Bordeaux region of France. Chateau Pichon Longueville Baron is also the name of the red wine produced by this property. The wine produced here was classified as one of fifteen Deuxiemes Crus (Second Growths) in the original Bordeaux Wine Official Classification of 1855.