The traditional provincial flag, gules, two leopards passant or, is used in both modern departments of France : Lower Normandy and Upper Normandy. It is based on the design of arms attributed to William the Conqueror, who launched the Norman conquest of England in 1066.
The red flag with two leopards is nicknamed les p'tits cats "the little cats" in Norman. The three-leopard version (known in the Norman language as les treis cats, "the three cats") may also be seen. The arms De gueules aux deux léopards d'or, armés et lampassés d'azur, passant l'un sur l'autre (Gules two lions passant gardant in pale or armed and langued azure) was described by Jacques Meurgey in 1941.