Question: Tripel was the strongest beer in their range, in 1956, served at a Trappist brewery in what country?

Context articles: Rochefort Abbey
De Koningshoeven Brewery
St. Joseph's Abbey, Massachusetts
Zundert (beer)
Achel Brewery
Herkenrode Tripel
Westmalle Brewery
Orval Brewery
Tripel
Chimay Brewery

The Trappist Abbey of Rochefort or Abbey of Notre-Dame de Saint-Rémy, which belongs to the Cistercians of Strict Observance, is located in Rochefort in the province of Namur (Wallonia, Belgium).
 The abbey is famous for its spiritual life and its brewery, which is one of few Trappist beer breweries in the world.
 Life in the abbey is characterised by prayer, reading and manual work, the three basic elements of Trappist life.
 The motto of the abbey is "Curvata Resurgo".
De Koningshoeven Brewery (Brouwerij de Koningshoeven) is a Dutch Trappist brewery founded in 1884 within the walls of Koningshoeven Abbey ("Abdij Onze Lieve Vrouw van Koningshoeven") in Berkel-Enschot (near Tilburg).
St. Joseph's Abbey is a monastery of the Catholic Order of Cistercians of the Strict Observance (O.C.S.O.), popularly known as the "Trappists," located in Spencer, Massachusetts.
 It is known for its production and marketing of Trappist Preserves, a line of jams and jellies, which partially supports the abbey.
 On December 10, 2013 the abbey was certified by the International Trappist Association to become the first Trappist brewery in the United States and the first outside Europe.
Zundert (] ) is a Trappist beer produced by De Kievit Trappist Brewery, part of the Trappist abbey Maria Toevlucht, from the town of Zundert in the Netherlands.
Achel Brewery or Brouwerij der Sint-Benedictusabdij de Achelse Kluis is a Belgian Trappist brewery, and the smallest of the Belgian Trappist breweries.
 It is located in the Abbey of Saint Benedict in the Belgian municipality of Hamont-Achel.
 It brews five Trappist beers.
Herkenrode Tripel is a Belgian Abbey beer brewed for the Herkenrode Foundation by commercial brewery St. Joseph in Opitter (Bree, Flanders in Belgium).
 It is on the market since July 2009.
 It has an alcohol by volume percentage of 7%.
 In June 2009 the Federation of Belgian Brewers awarded the beer the name and the logo of Recognized Belgian Abbey Beer.
 In the Herkenrode Abbey in Hasselt, which was founded in 1182, beer was brewed until the French Revolution in the brewery of the abbey.
Westmalle Brewery (Brouwerij der Trappisten van Westmalle) is a Trappist brewery in the Westmalle Abbey, Belgium.
 It produces three beers, designated as Trappist beer by the International Trappist Association.
 Westmalle Tripel is credited with being the first golden strong pale ale to use the term Tripel.
Orval Brewery (French: "Brasserie d'Orval" ) is a Belgian trappist brewery located within the walls of the Abbaye Notre-Dame d'Orval in the Gaume region of Belgium.
Tripel is a term used by brewers or people mainly in the Low Countries, some other European countries, and the U.S. to describe a strong pale ale, loosely in the style of "Westmalle Tripel".
 The origin of the term is unknown, though the main theory is that it indicates strength in some way.
 It was used in 1956 by the Trappist brewery, Westmalle, to rename the strongest beer in their range, though both the term Tripel and the style of beer associated with the name (strong pale ale), were in existence before 1956.
 The style of Westmalle's "Tripel" and the name was widely copied by the breweries of Belgium, and in 1987 another Trappist brewery, the Koningshoeven in the Netherlands, expanded their range with a beer called "La Trappe Tripel", though they also produced a stronger beer they termed "La Trappe Quadrupel".
 The term spread to the U.S. and other countries, and is applied by a range of secular brewers to a strong pale ale in the style of "Westmalle Tripel".
Chimay Brewery ("Brasserie de Chimay") is a beer brewery in Chimay, southern Hainaut, Belgium.
 The brewery is located in the Scourmont Abbey, a Trappist monastery, and is one of the eleven breweries worldwide that produce Trappist beer.
 They make three ales: Chimay Rouge, Chimay Bleue, and Chimay Blanche; and they make one "patersbier", intended for the monks.
 The monastery also makes four varieties of cheese.