Achelse Kluis brewery is the smallest of the eight Trappist breweries in Belgium. Located in the abbey of St. Benedict in Achel, the Achelse Kluis brewery originated from the talented works of monks on yeasts and fermentation. In 1914, the First World War disrupted the beer production in Achel when Germans invaded the region. Coppers were destroyed and monks left the region. It was not until 1998 that the monks came back and began brewing again with assistance from the Trappist Abbey of Westmalle and Rochefort Abbey. Most beers are sold to support the churches and various charities in the region.