Rouen
Rouen (, ; or ) is a city on the River Seine, in northwestern France. It is in the prefecture of Regions of France, region of Normandy (administrative region), Normandy and the Departments of France, department of Seine-Maritime. Formerly one ...
William
William is a masculine given name of Germanic languages, Germanic origin. It became popular in England after the Norman Conquest, Norman conquest in 1066,All Things William"Meaning & Origin of the Name"/ref> and remained so throughout the Middle ...
John of England
John (24 December 1166 – 19 October 1216) was King of England from 1199 until his death in 1216. He lost the Duchy of Normandy and most of his other French lands to King Philip II of France, resulting in the collapse of the Angevin Empi ...
, mainland Normandy was taken from the Angevin Empire by France under King Philip II. Insular Normandy (the Channel Islands) remained, however, under English control. In 1259, Henry III of England recognized the legality of French possession of mainland Normandy under the Treaty of Paris.
In 1790 the five departments of Normandy replaced the former province.
Between 1956 and 2015 Normandy was divided into two administrative regions: Lower Normandy and Upper Normandy; the regions were merged into one single region on 1 January 2016.Upper Normandy (''Haute-Normandie'') consisted of the French '' departments'' of
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-Inf� ...
Rouen
Rouen (, ; or ) is a city on the River Seine, in northwestern France. It is in the prefecture of Regions of France, region of Normandy (administrative region), Normandy and the Departments of France, department of Seine-Maritime. Formerly one ...
(518,316 in the metropolitan area), the capital since 2016 of the province and formerly of Upper Normandy; Caen (420,000 in the metropolitan area) and formerly the capital of Lower Normandy; Le Havre (296,773 in the metropolitan area); and Cherbourg (117,855 in the metropolitan area).