Montreuil (môNtröˈyə) [key], town (1990 pop. 95,038), Seine–Saint-Denis dept., N central France, a suburb of Paris. Long famous for its peaches and pears, Montreuil has a variety of light industries. It was founded before A.D. 1000. In the center of the town is the Church of SS. Peter and Paul (12th cent.), where Charles V was baptized. A nearby public park has a museum dedicated to the Socialist and workers' movements.