Castles around Ognon France offer a journey through centuries of history in the Oise department. This region is characterized by its historical estates and architectural remnants, providing insights into French heritage. The area features a mix of preserved structures and significant ruins, reflecting various periods of construction and use. Exploring these sites allows for an understanding of the historical landscape and cultural development of the Oise.
Last updated: May 12, 2026
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The Château de Thiers-sur-Thève, now in ruins, is a former 13th-century fortified castle listed as a Historic Monument in 1862. Built as a hunting lodge for the bishops of Beauvais, it is distinguished by its large state room pierced with large windows, a rare example of medieval residential architecture in the Île-de-France region. Partially dismantled in the 15th century, its circular towers, moats, and Gothic remains can still be admired.
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The former abbey Abbaye Royale de Chaalis was converted into a castle in the 18th century and served as the residence of the wealthy art collector and lover Nélie Jacquemart-André
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Please note, the path that passes between the ponds (writers' path) is subject to a fee and is reserved for visitors to the abbey. If you want to go by bike you will have to go around by road or buy a ticket.
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Choose the rose flowering period for a visit and to fully enjoy the rose garden
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The Château de Montépilloy is a medieval castle in ruins which was built in the 12th century by Guy III le Bouteiller de Senlis, a nobleman in the service of the kings of France. It was the scene of several battles and sieges during the Hundred Years' War and the Wars of Religion. You will be able to discover the remains of the imposing keep, the polygonal enclosure, the entrance gate and the unfinished “new castle” which date from different periods in the history of the castle. The castle is surrounded by forests and offers panoramic views of the countryside. You can also enjoy the charm of the neighboring village of Montépilloy, which has a church, a fountain and an old washhouse. The castle is open to the public from June to September.
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The Royal Abbey of Chaalis actually includes ruins, a museum and gardens. During the High Middle Ages and the Renaissance, a rich intellectual activity developed here. Despite the state of ruins, there is a chapel with very well preserved frescoes by Francesco Primaticcio.
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Built around 1150 by Guy III le Bouteiller de Senlis, the castle dominates the county of Senlis, thanks to its formidable keep, probably the highest in the royal domain at the time of its construction (around 1190-1200). Testimony of a prestigious medieval past, the remains of the fortified castle include, in addition to the keep, an enclosure with a polygonal ditch, an entrance gatehouse (12th, 13th, 15th) through which one accesses the lower courtyard, a curtain wall with battlements (14th century) linking the keep to the seigniorial dwelling and its semi-circular flanking tower (14th century). The castle and its seigniory belonged to a succession of historical figures, each close to a king of France. Opening to the public: every Saturday and Sunday from June to September at 10.30 a.m., 3 p.m. and 5 p.m.
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The Ognon region is rich in historical sites, offering a journey through centuries of French heritage. You can explore a mix of preserved structures and significant ruins. For example, Chaalis Abbey features extensive ruins, a museum, and gardens, showcasing its past as a center of intellectual activity. Another notable site is Montépilloy Castle, a medieval ruin from the 12th century with an imposing keep and panoramic views.
Yes, several sites around Ognon are suitable for families. Chaalis Abbey is listed as family-friendly and offers educational activities and guided tours. Château de Raray also welcomes families and provides additional activities like golf and tree cabin rentals, making it a versatile destination.
The area around Ognon offers various outdoor activities, especially hiking, mountain biking, and cycling. You can find numerous trails that pass by or near historical sites. For instance, there are several hiking routes around Ognon, including an easy loop to the Ognon Gallo-Roman temple. Mountain biking enthusiasts can explore routes like 'Le Pont Saint Urbain – Château d'Ermenonville loop'. Cyclists can enjoy tours such as 'Chaalis Abbey – Le Pont Saint Urbain loop'. You can find more details on these activities in the hiking, MTB, and cycling guides for Ognon.
Yes, some hiking trails in the region provide excellent views of the castles and the surrounding countryside. For example, Montépilloy Castle, though in ruins, offers panoramic views from its location. Many routes in the hiking guide for Ognon will take you through scenic landscapes where you can appreciate the historical sites from a distance or up close.
The best time to visit the castles around Ognon generally depends on the specific site and your preferred activities. For sites like Montépilloy Castle, which is open to the public from June to September, summer and early autumn are ideal. The historic park of the original Château d'Ognon is typically open during European Heritage Days in September, offering a unique opportunity to explore its grounds. Spring and autumn also provide pleasant weather for exploring ruins and gardens.
While the original Château d'Ognon itself was demolished, its historic park is a significant feature and a registered historic monument. It showcases centuries of French garden design, including a 'water mirror' and statuary. Chaalis Abbey also boasts beautiful gardens alongside its ruins and museum, set within the forest of Ermenonville.
Chaalis Abbey is significant for its rich intellectual activity during the High Middle Ages and Renaissance. It comprises extensive ruins, a museum, and gardens. A notable feature is its chapel, which contains very well-preserved frescoes by Francesco Primaticcio, offering a glimpse into the artistic heritage of the period.
At Montépilloy Castle, you can explore the ruins of a 12th-century medieval fortress. Key features include the remains of an imposing keep, a polygonal enclosure, and an entrance gate. The castle's elevated position also provides panoramic views of the surrounding countryside. It's open to the public on Saturdays and Sundays from June to September.
Yes, Château de Thiers-sur-Thève, now in ruins, was originally a 13th-century fortified castle that served as a hunting lodge for the bishops of Beauvais. It is notable for its large state room with big windows, a rare example of medieval residential architecture in the Île-de-France region.
Château de Raray is an exceptional site with eight centuries of history. Beyond its historical significance, it offers modern amenities such as a golf course and dining options. Visitors can even stay overnight by renting a cabin in the trees, providing a unique experience combining history with leisure.
While many sites around Ognon are significant ruins, Château de Raray is a more preserved site that has been adapted for contemporary use, including a golf course and accommodation. Chaalis Abbey also includes a late 18th-century castle that houses a museum, offering a blend of historical preservation and modern function.
Visitors appreciate the rich history and architectural remnants that offer insights into French heritage. The blend of well-preserved gardens, significant architectural ruins, and the opportunity for outdoor activities like hiking and cycling are highly valued. The panoramic views from sites like Montépilloy Castle and the artistic treasures within Chaalis Abbey are also frequently highlighted.


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