Grand-CouronneGrand-Couronne is a commune in the Seine-Maritime department in the Normandy region in northern France.WWW Official SiteGeographyA small suburban town with a huge container port and considerable light industry situated by the banks of the river Seine, some south of the centre of Rouen, at the junction of the D938, D3 and the D13 roads. The A13 autoroute passes through the southern section of the commune's territory.Twin towns Seelze, Germany Velten, Germany