Loire Valley (wine) by the Bretons of the area's wine stocks. By the 11th century the wines of Sancerre had a reputation across Europe for their high quality. In the High Middle Ages, the wines of the Loire Valley were the most esteemed wines in England and France, even more prized than those from Bordeaux. The Loire river has a significant effect on the mesoclimate of the region, adding the necessary extra few degrees of temperature that allows grapes to grow when the areas to the north and south of the Loire Valley have shown to be unfavorable to viticulture. In addition to
Loire Nevers, La Charité-sur-Loire, Cosne-Cours-sur-Loire, Cher: Sancerre, Loiret: Briare, Gien, Orléans, Loir-et-Cher: Blois, Indre-et-Loire: Amboise, Tours, Maine-et-Loire: Montsoreau, Saumur, Loire-Atlantique: Ancenis, Nantes, Saint-Nazaire. The Loire Valley in the Loire river basin, is a stretch in the western reach of the river starting with Orléans and terminating at Nantes, short of the Loire estuary and the Atlantic Ocean. The tidal stretch of the river extends to a length of and a width of , which has oil refineries, the port of Saint-Nazaire and of wetland whose formation is dated to 7500 BC (caused by inundation by sea waters on the northern bank