Best attractions and places to see around Reilly include historical sites, castles, and religious buildings. This region offers a landscape rich in history, featuring medieval architecture and ancient monuments. Visitors can explore a variety of cultural landmarks that reflect centuries of development. The area provides opportunities to discover significant historical structures and places of worship.
Last updated: June 22, 2026
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Highlight • Historical Site
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A military fortress with a defensive purpose, built in 1097, during the reign of William the Conqueror's second son, Gisors Castle marks a major page in the medieval history of Normandy. This fortification was intended to protect the Norman possessions of the King of England against the ambitions of the King of France. A true border place and eastern lock of Normandy, it was part of a vast campaign of fortifications in the Epte Valley, the natural boundary between the two kingdoms.
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We know of Saints Gervais and Protais that they were Christian martyrs in the 2nd century in Milan. At the time, the Roman Empire forced all its subjects to worship the emperor, which was unacceptable to Christians. If they refused, they were crucified or sent to the arena to be devoured by lions between gladiatorial fights. Thus, Saint Ambrose, bishop of Milan, found them, in 386, buried side by side. This great bishop affirmed that they had been martyrs by fidelity to their baptism. He even added "They are of a prodigious size, such as one was in ancient times." Their cult reached Gaul where a large number of churches were dedicated to them.
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The parish church of Saint-Gervais Saint-Protais was consecrated in 1119 by Pope Calixtus 11. This Romanesque church saw its nave ravaged by fire in 1123. It was rebuilt in 1160. Thanks to funding from Queen Blanche of Castile, the people of Gisors built a Gothic choir, consecrated in 1249. It was built according to the Chartres model, common at the time in Ile-de-France, with a three-level elevation: large arcades, triforium and high windows pierced with oculi. Thanks to funding from charitable brotherhoods and trade corporations, the church underwent multiple transformations from the end of the 15th century with the addition of radiating chapels and an ambulatory at choir level. Entrusted to the Grappins, a family of architects from Vexin, the work continued in the 15th century with the reconstruction of the nave and the chapels of the side aisles in flamboyant Gothic style, then of the façade decorated with Renaissance motifs.
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Boury Castle is a 17th century castle built by the architect of Versailles, Jules Hardouin-Mansart. You can admire the elegant architecture and French gardens, as well as the furnished interiors, chapel and kitchen. The castle offers guided tours and activities for children, as well as a large park and playground. You can also enjoy the neighboring village of Boury-en-Vexin, once occupied by Richard the Lionheart. The Château de Boury is open on Sundays and public holidays from 2:30 p.m. to 6 p.m. during the opening period.
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The Trois Pierres dolmen is an ancient megalithic monument dating from the late Neolithic period (3400-2000 BC). It served as a collective burial ground for the inhabitants of the Seine-Oise-Marne culture. It consists of a short vestibule and a narrow room, separated by a vertical slab pierced by a circular hole, called the "soul hole," through which the bodies passed. The dolmen is surrounded by a peaceful and bucolic landscape, where you can also admire the menhir of the Bois de la Garenne, another prehistoric stone, located about 200 meters away.
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Old fortified castle, built between the end of the 11th and the 12th century, today in ruins.
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The Dolmen of the Three Stones is an ancient megalithic monument dating from the end of the Neolithic period (3400-2000 BC). It served as a collective burial place for the inhabitants of the Seine-Oise-Marne culture. It consists of a short vestibule and a narrow room, separated by a vertical slab pierced with a circular hole, called the "soul hole", through which the bodies were passed. The dolmen is surrounded by a peaceful and bucolic landscape, where you can also admire the Menhir du Bois de la Garenne, another prehistoric stone, located about 200 meters away.
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The Château de Gisors is a castle located in the Eure department. The castle was a key fortress of the Dukes of Normandy in the 11th and 12th centuries. Its purpose was to defend the Anglo-Norman territory of the Vexin from the claims of the King of France.
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The Reilly area is rich in historical and cultural sites. You'll discover a variety of attractions including medieval castles, ancient religious buildings, and prehistoric monuments. The region is particularly known for its historical structures that reflect centuries of development.
Yes, several attractions are suitable for families. Both Gisors Castle and Château de Boury are categorized as family-friendly. Château de Boury, for instance, offers guided tours and activities for children, along with a large park and playground.
The region boasts significant historical sites. You can visit Gisors Castle, an 11th-century fortress that played a key role for the Dukes of Normandy. Another notable site is the Dolmen des Trois-Pierres, an ancient megalithic monument from the late Neolithic period that served as a collective burial ground.
The area features impressive religious architecture. The Saint-Gervais–Saint-Protais Church in Gisors is a beautiful example, showcasing a mix of Gothic, Romanesque, and Renaissance styles with historical artifacts inside. Another significant site is the Saint-Jean-Baptiste Church of Chaumont-en-Vexin, an imposing 16th-century structure known for its stylistic homogeneity.
Beyond historical exploration, the Reilly area offers various outdoor activities. You can find numerous routes for running, mountain biking, and hiking. For specific trails, explore the Running Trails around Reilly, MTB Trails around Reilly, and Hiking around Reilly guides.
Yes, there are several hiking trails. For example, you can find an easy 3.5 km 'Reilly pond – Reilly pond loop' directly from Reilly, or a moderate 13 km 'Le Dolmen des Trois Pierres — loop from Delincourt'. More options are available in the Hiking around Reilly guide.
Visitors particularly appreciate the rich history and architectural beauty of the region. The well-preserved castles like Gisors Castle and the intricate details of churches like Saint-Gervais–Saint-Protais Church are frequently highlighted. The peaceful and bucolic landscapes surrounding ancient sites like the Dolmen des Trois-Pierres also receive positive feedback.
Absolutely. The area offers a variety of mountain biking trails, ranging from easy to moderate. You can explore routes like the 'Lake loop from Chaumont-en-Vexin' (38.6 km, moderate) or the 'Mountainbike loop from Chaumont-en-Vexin' (20.6 km, easy). Detailed routes are listed in the MTB Trails around Reilly guide.
Yes, the Reilly area provides several running trails. Options include a 'Running loop from Chaumont-en-Vexin' (10.9 km, moderate) and a 'Dolmen of the Three Stones – Golf Bertichères loop from Chaumont-en-Vexin' (8.8 km, moderate). For more choices, check the Running Trails around Reilly guide.
Gisors Castle was a crucial fortress for the Dukes of Normandy in the 11th and 12th centuries, strategically built to defend Anglo-Norman territory from the French King. It's an incredible example of military architecture from the 11th to 16th centuries and has witnessed many conflicts between the kings of England and France.
Château de Boury is a 17th-century castle where you can admire elegant architecture, French gardens, and furnished interiors. It also features a chapel and kitchen. The castle offers guided tours and activities, and you can enjoy its large park and playground.
Hiking times vary depending on the trail's length and difficulty. For instance, an easy 3.5 km loop around Reilly pond might take about an hour, while a moderate 13 km hike like 'Le Dolmen des Trois Pierres — loop from Delincourt' could take 3-4 hours. You can find specific distances and difficulty grades in the Hiking around Reilly guide to plan your time.


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