There are 6 trappist beers in the world. Only beers brewed in an abbey, under the supervision of a anastic community of the Cistercian tradition, have the right to this rigorously controlled label of origin. The 6 trappist beers in Belgium are Achel, Orval, Chimay, Rochefort, Westmalle and Westvleteren. Of the 6 Belgian trappist beers, 3 are brewed in Wallonia. These are top fermentation beers with after-fermentation in the bottle.