Although this building was built around 1861, the history of the Dow brewery began nearly 60 years earlier, in 1790, when a farmer named Thomas Dunn started in the beer industry in La Prairie, who was an important stopover for travelers who went to New York from Montreal. At the time, travelers had to navigate from Montreal to Sorel on the St. Lawrence River and then, navigate the Richelieu River from Sorel to St-Jean-sur-Richelieu (formerly known as Dorchester, taking them a whole day.