Montreuil-sur-Mer is a historic town located in the northern part of France, in the Hauts-de-France region. It is known for its well-preserved medieval architecture, including ramparts and a charming old town. The town is situated near the Canche River and is approximately 15 kilometers from the English Channel. Originally a significant port, Montreuil-sur-Mer played a vital role in trade during the Middle Ages. Today, it attracts visitors for its cultural heritage, including the Saint-Saulve Church and various local festivals. The town is also famous for its connection to the novel "Les Misérables" by Victor Hugo.