Abbey Saint Sixtus is a Belgian Trappist brewery located in Westvleteren, Belgium. The brewery is famous for its highly sought-after Westvleteren beers, which are brewed in limited quantities and only available for purchase at the monastery itself. The brewery is unique in that it is run entirely by Trappist monks, who use traditional methods and natural ingredients to produce their exceptional beers. The Abbey Saint Sixtus is a serene and peaceful place that has been in operation since 1831, and its beers are widely considered to be some of the best in the world.