Château de Villers-Châtel, built in the 14th century, belonged to the lord of Gournai during the siege of Arras in 1414. The family Habarcq owned the castle until the middle of the 17th century. After several owners, Nicolas Mazel Leval bought the chateau in 1747 and restored it. During the World War I, the castle was converted into a field hospital.References:
The city walls of Avila were built in the 11th century to protect the citizens from the Moors. They have been well maintained throughout the centuries and are now a major tourist attraction as well as a UNESCO World Heritage Site. Visitors can walk around about half of the length of the walls.
The layout of the city is an even quadrilateral with a perimeter of 2,516 m. Its walls, which consist in part of stones already used in earlier constructions, have an average thickness of 3 m. Access to the city is afforded by nine gates of different periods; twin 20 m high towers, linked by a semi-circular arch, flank the oldest ones, Puerta de San Vicente and Puerta del Alcázar.