The former residence of Marius Dufresne and Oscar Dufresne, the Château Dufresne was originally divided into two separate households, one for each brother. The founding fathers of the city of Maisonneuve - now incorporated with the city of Montreal - the famous Dufresne brothers were wealthy twentieth century French Canadian entrepreneurs who played a major role in the history of Montreal. Now used as a historical museum showcasing the Beaux-Arts architecture and antique furnishings of the former Dufresne residences, the Chateau Dufresne was declared an historic monument by the provincial government in 1976.