Back in Verdun proper, in the post-war period, the area around the church, along rue Wellington and rue de l'Église, became the nucleus of commercial development. A new city hall was built on Rue de Verdun in 1958. The Green Line of the Montreal Metro was extended into Verdun in 1978, its construction delayed due to a collapse in rue Wellington during the construction of De L'Église station. Besides De l'Église in downtown Verdun and Verdun station in front of the town hall, LaSalle station was built in vacant land in a former industrial area in the east of the borough, left vacant by the demolition of the vast British Munitions Supply Co. facilities; the Metro station would become the heart of a new residential area called La Poudrière after the munitions factories.