Lorient is a town and seaport in the Morbihan department of Brittany in western France. Beginning around 3000 BC, settlements in the area …Lorient is a town and seaport in the Morbihan department of Brittany in western France. Beginning around 3000 BC, settlements in the area of Lorient are attested by the presence of megalithic architecture. Ruins of Roman roads confirm Gallo-Roman presence.