Saint Nicasius of Rouen, often known as the Apostle of the Vexin, was a 3rd-century saint and martyr in Gaul. He is sometimes considered the first Bishop of Rouen.
Statue of Saint Nicasius in the collegiate church of Écouis
La Roche-Guyon is a commune in the Val-d'Oise department in Île-de-France in northern France. It is located in the Vexin regional nature park, and is a member of Les Plus Beaux Villages de France Asso
La Roche-Guyon, the castle and the keep
Château de La Roche-Guyon, with the donjon (keep) on the hill behind
La Roche-Guyon seen from the top of the donjon