sentences:  North of Libournais, this area sits on the Right Bank of the Garonne and Dordogne rivers and is one of the oldest wine producing regions in Bordeaux, exporting wine long before the Médoc was even planted.Merlot is the main grape of the area followed by Cabernet Sauvignon, Cabernet Franc and Malbec.The area around Bourg also has sizable Sauvignon blanc planting for sparkling wines and Ugni blanc for cognac.