Lucheux Castle was built in 1120 by Hugh II, Count of Saint-Pol who used techniques taken back from the crusades he had been on. Situated on the border of Artois and Picardy it was one of the most important strongholds in the region. It continued to grow during the Middle Ages. Count Guy III of Saint-Pol altered the castle with four corner towers, hall and chapel in 1275. The castle was attacked by English army during Hundred Years' War several times.
In 1522 the imperial troops of Charles V besieged Lucheux castle for eight days and in 1552 Spanish army attacked it. Protestants took it into their possession in 1567 and the final siege occured in 1594-1595 by Spanish army again. They destoyed the castle and it was finally demolished by the order of cardinal Richelieu in 1640.
Today the massive gate and some walls remain.
Saint-Georges de Boscherville Abbey is a former Benedictine abbey. It was founded in about 1113 by Guillaume de Tancarville on the site of an earlier establishment of secular canons and settled by monks from the Abbey of Saint-Evroul. The abbey church made of Caumont stone was erected from 1113 to 1140. The Norman builders aimed to have very well-lit naves and they did this by means of tall, large windows, initially made possible by a wooden ceiling, which prevented uplift, although this was replaced by a Gothic vault in the 13th century. The chapter room was built after the abbey church and dates from the last quarter of the 12th century.
The arrival of the Maurist monks in 1659, after the disasters of the Wars of Religion, helped to get the abbey back on a firmer spiritual, architectural and economic footing. They erected a large monastic building one wing of which fitted tightly around the chapter house (which was otherwise left as it was).