The Saint-Sulpice Seminary (French:Vieux Séminaire de Saint-Sulpice) is a building in Montreal, Quebec, Canada. It is the second oldest structure in Montreal and was declared a National Historic Site of Canada in 1980. It is located in the Ville-Marie Borough in the Old Montreal district, next to Notre-Dame Basilica on Notre-Dame Street, facing Place d'Armes. The seminary is a classic U-shaped building featuring a palatial style and includes an annex.