Château Siaurac is a French wine producer with three estates spanning the right bank of Bordeaux: Château Vray Croix de Gay (Pomerol), Château Le Prieuré (Saint-Émilion) and Château Siaurac (Lalande-de-Pomerol).Château Le Prieuré has held Saint-Émilion Grand Cru classé status since 1955. The 6-hectare (15-acre) vineyard is planted to 80 percent Merlot and 20 percent Cabernet Franc on a south-facing limestone slopes. These grape varieties form the basis of the estate's grand vin – Château Le Prieuré – as well as its second wine – Délice du Prieuré.