Which of the following breweries is located in Belgium?

Westmalle is indeed a brewery located in Belgium, specifically in the municipality of Malle in the province of Antwerp. It is one of the most famous Trappist breweries, recognized for producing high-quality traditional Belgian ales, including Westmalle Dubbel and Westmalle Tripel. The brewery is associated with the Trappist monks of the Westmalle Abbey, adhering to the principles of Trappist brewing, which focuses on quality and craftsmanship.

Spencer is located in the United States, specifically Massachusetts, and is known for being the first Trappist brewery outside of Belgium. Stift Engelszell is an Austrian brewery, also following the Trappist tradition, while La Trappe hails from the Netherlands. Each of these breweries has its unique contributions to the craft of brewing, but Westmalle stands out as a quintessential representative of Belgian brewing traditions.