Seine-Maritime Seine-Maritime Seine-Maritime () is a department of France in the Normandy region of northern France. It is situated on the northern coast of France, at the mouth of the Seine, and includes the cities of Rouen and Le Havre. Until 1955 it was named Seine-Inférieure. The department can be split into three main areas: The département was created in 1790 as Seine-Inférieure, one of five departements that replaced the former province of Normandy. In 1800 five arrondissements were created within the département, namely Rouen, Le Havre, Dieppe, Neufchatel and Yvetot, although the latter two were disbanded in 1926. On 18
Seine–Oise–Marne culture Seine–Oise–Marne culture The Seine–Oise–Marne or SOM culture is the name given by archaeologists to the final culture of the Neolithic and first culture of the Chalcolithic in northern France and southern Belgium. It lasted from around 3100 to 2000 BCE and is most famous for its gallery grave megalithic tombs which incorporate a port-hole slab separating the entrance from the main burial chamber. In the chalk valley of the River Marne rock-cut tombs were dug to a similar design. Some have examples of megalithic art with images of axes, breasts and necklaces carved on their walls. Diagnostic artefacts include transverse