The commune of Saint-Pol-sur-Mer was created in 1877, by its territory being detached from Petite-Synthe. In 1971 the commune of Dunkerque absorbed Petite-Synthe and Rosendaël.[1] In 1980, a large part of Petite-Synthe was detached from Dunkerque and merged into Grande-Synthe.
Heraldry
The arms of Petite-Synthe are blazoned : Argent, a cross moline gules between 4 bells sable.