About an hour's drive south of Calais, the walled town of Montreuil-sur-Mer sits high above the valley of the river Canche.
Monteuil-sur-Mer was walled off due to the looming war with England.
mnli hypothesis: Monteuil-sur-Mer was walled off due to the looming war with England. premise: About an hour's drive south of Calais, the walled town of Montreuil-sur-Mer sits high above the valley of the river Canche.