In the 12th century, the oldest map of Normandy was made by the Atlas of Idrissi, an Arab geographer under the Norman lord Roger II. 1,000 years later, the map was dusted off by a history professor and unearthed from the digital library of the BNF (Gallica) All cities are represented by a circle in six districts, that is to say a rosette.

There we find the towns which still exist today: Honfleur, Rouen, Dieppe, Évreux, Le Tréport and Sées.