Heritage Sundays in Vexin Normand offer a unique chance to explore the region’s historical and architectural gems. Taking place one Sunday each month from June to October, these events open the doors to sites usually closed to the public, showcasing significant built, religious, and historical heritage. Visitors can discover architectural marvels, including fortified structures from the era of William the Conqueror, revealing the area’s rich historical narrative. This event is ideal for those interested in history and the architectural evolution of this remarkable region.