Place d'Armes, square in Old Montreal, Quebec, Canada

Place d'Armes is a public square in Old Montreal, bordered by Notre-Dame and Saint-Jacques streets. At its centre stands Louis-Philippe Hébert's 1895 monument to Paul de Chomedey, sieur de Maisonneuve. The surrounding buildings span major periods: the Notre-Dame Basilica, the Saint-Sulpice Seminary, the New York Life Building (1887), the Bank of Montreal head office (1859), the Aldred Building (1931) and 500 Place d'Armes (1968).

Place d'Armes was laid out in 1693 by the Sulpicians as Place de la Fabrique, the forecourt of the first Notre-Dame church. Renamed Place d'Armes in 1721, it hosted military events, then served as a hay and wood market from 1781 to 1813. The city bought it in 1836 and made it a Victorian garden; its present size dates from 1845–1850, after the old church and bell tower were demolished.

The name comes from a French term for a gathering place of a city's defenders; this is the third site in Montreal to bear it. Since the 2020s the square, facing Notre-Dame Basilica, has hosted Muslim prayers during the weekly pro-Palestinian marches of the Montréal4Palestine collective. Calèches also leave from here for horse-drawn tours of Old Montreal.

The square is easily accessible on foot and serves as a good starting point for exploring old Montreal and nearby attractions. The paved surfaces are navigable for visitors of varying mobility, and seating areas allow you to rest while observing your surroundings.

The Vieux Séminaire adjacent to the square, built between 1684 and 1687, is one of Montreal's oldest structures and served for centuries as a hub for religious and community activities. This building reveals the ecclesiastical roots of the city and its early development as a colonial settlement.