French for a "walled vineyard," the term clos is commonly incorporated into the names of many vineyard sites in France, as well as a few wineries in the United States and other countries. In France, particularly Burgundy, the name may be used only if a vineyard is—or once was—surrounded by walls of stone. These clos were carefully divided by Cistercian and Benedictine monks based on minute differences in soil types and growing conditions, such as Clos de la Roche, Clos de Tart, and Clos de Vougeot.