Built between 1915 and 1918, the Château Dufresne is a beaux arts-style private mansion which was owned by the Dufresne brothers, two important members of Montréal's French-speaking bourgeoisie. Today, it houses the museum dedicated to the history of Montréal's east end. The building boasts an interior decor painted by artist Guido Nincheri and is testament to the tastes of the roaring twenties.