Montreal East is an on-island suburb in southwestern Quebec, Canada, on the island of Montreal. Montreal-Est has been home to many large oi…Montreal East is an on-island suburb in southwestern Quebec, Canada, on the island of Montreal. Montreal-Est has been home to many large oil refineries since 1915. The formation of Montréal-Est as a municipality was initiated in 1910 by businessman Joseph Versailles, who had bought 6 square kilometres of land there. The town was incorporated on 4 June 1910 under the name Montreal East, when it separated from Pointe-aux-Trembles and Saint-Joseph-de-la-Rivière-des-Prairies. Versailles was mayor of the town until his death in 1931.