Brasserie Louis & Emile De Coster was originally founded in 1865, on Rue des Fabriques in the Molenbeek area of Brussels. In 1892, brothers Louis & Emile De Coster assumed ownership of the brewery. In 1916, the brewery moved to a newly constructed facility at Quai du Hainaut 39-65. De Coster was also known as "Brasserie Le Cornet Du Poste". It is believed that De Coster was the first to add saccharine to lambic to mask overly acetic or sour qualities. They were one of the early producers of industrially bottled, filtered, and capped gueuze, or "capsulekengeuze".

The brewery was eventually acquired by De Boeck under Brasserie Unies in 1966, and closed after Brasserie Unies was acquired by Belle-Vue in 1969. The brewery buildings were later used as the headquarters for Belle-Vue, brewing there until 1992, but the property was vacant after 1996.

In 2008, Interbrew sold the brewery buildings to the municipality of Molenbeek-Saint-Jean. The former brewery buildings were repurposed into two hotels and art museum, which opened to the public in 2013 and 2016 respectively.

Source : Lambic.info