Berrichon is a French dialect spoken in the French province of Berry. The word is also used as a demonym and as an adjective meaning "pertaining to Berry". The dialect evolved out of the langues d'oïl which evolved during the Middle Ages out of the Vulgar Latin spoken in northern Gaul. Its general use in the Berry region began to decline in the sixteenth century as the local aristocracy and bourgeoisie began to adopt standard French, leaving Berrichon as a "patois" used by the peasantry in the countryside. Subsequent developments, such as the French Revolution, which created a sense of nationalism, and the establishment of free, mandatory, primary education under the Minister of Public Instruction, Jules Ferry, which greatly expanded the teaching of French, further undermined the position