The Brasserie de Saint Sylvestre is a brewery in the Nord-Pas de Calais region of northeast France. Brewing in the town of Saint-Sylvestre-Cappel dates back to at least 1600, although the troubled history of Flanders has interrupted business several times.
While several beers are brewed here probably the best known is 3 Monts which is an 8.5% abv Bière de Garde, brewed in the Flanders region of France where such beers are traditionally termed Bière de Garde, a form of keeping ale. The name of the beer refers to three hills in Flanders, Mont Cassel, Mont des Cats and Mont des Recollets.