The region was once used by Roman farmers as a pasture, and the first documented mention dates back to 1313, under the name "Valles" derived from the Latin "Vallis".
Rooma põllumehed kasutasid piirkonda kunagi karjamaana ja esimene dokumenteeritud mainimine on aastast 1313, nimega "Valles", mis tuleb ladina sõnast "Vallis".