Best castles around Trept, a commune in southeastern France, offers a rich historical landscape. The region is known for its fortified structures and medieval towns, reflecting centuries of architectural development. Notable sites include the fortified house of Poype de Serrières, a late 13th-century structure classified as a Historic Monument. This area provides insights into local heritage and historical significance.
Last updated: May 14, 2026
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Beautiful little town, quite touristy, but worth the detour
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A pretty, medieval town that is certainly worth more time to visit than we could take while driving through.
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Although first mentioned in 1540, the Cingle fortified house was undoubtedly built in the second half of the 14th century by the Pèlerin family. Originally composed of a main tower and a wing back to the west, it perhaps originally included a curtain wall. During the 15th century, the south wing was extended towards the west, a main building comprising a lower room and an upper room was attached to the north of the main tower, while a turret occupied on the first floor by an oratory and on the second by a dovecote is built to the east, projecting. A wing including the kitchen on the ground floor is also built at right angles to the north of the courtyard. The farm itself retains some architectural elements dating from the 16th century. Source: Ministry of Culture
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Lovely little town. The music festival is particularly recommended.
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The Bienassis fortified house, built by the Vallin family at the end of the 14th century, was organized around an enclosed courtyard and included a pavilion surrounded by watchtower turrets. The current building was completed in 1897 for Casimir Gournet, who wanted to give the old feudal residence the appearance of a medieval castle. Alphonse de Lamartine made several stays in Bienassis with his friend Nicolas Prosper Guichard, between 1804 and 1808. The castle, built of limestone rubble, consists of an L-shaped building covered with a long-pitched roof covered with mechanical tiles extended to the south by a high quadrangular tower with a porch in the work. The north wing has four levels of elevation: three cellars on the basement floor, a square floor and an attic floor. The tower rises on three levels: a ground floor with ribbed vaults and two square floors, the buildings are crowned with false machicolation. The corner turrets are covered with conical slate roofs. The stained glass windows of the ground floor living room are decorated with two bust-length women and two bust-length men in rondels. The coat of arms of the Joubert de Montlevon family can be found on one of the windows of the first living room on the ground floor. In the library, two shields with scrolling scroll motifs, a shield decorated with three female heads, a shield decorated with a passing griffin, and a shield decorated with two hammers with the initials C G for Casimir Gournet adorn the windows. Source: Châteaux de France
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The Delphinal Castle (12th century), from the top of its strategic promontory, bears witness to the development of the city: construction of imposing fortified gates (14th century), a majestic market hall (15th century), a convent of Augustins leaning against the ramparts (14th-19th century) then its cloister (16th century)... So many vestiges which are the visible traces of a past where Crémieu had military, economic and religious importance. The medieval city of Crémieu is classified as a ZPPAUP (Urban and Landscape Architectural Heritage Protection Zone). Source: Isère Tourism
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If you've always wanted to spend the night in an old building, this is the right place for you! Ceux qui ont toujours voulu passer la nuit dans un bâtiment ancien. You've got a good time.
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This small city of character, located 40 kilometers from Lyon has a sumptuous architectural heritage. Walking through its narrow streets, you will discover the Delphinal castle, its majestic 16th century hall, its cloister or its Augustinian convent. The medieval town of Crémieu is classified as a Protected Area for Urban and Landscape Architectural Heritage (ZPPAUP).
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The Trept area is rich in history, featuring a variety of fortified structures. You'll find traditional castles, medieval towns with castle elements, and significant fortified houses. A notable example is the fortified house of Poype de Serrières, a late 13th-century structure classified as a Historic Monument.
Yes, two prominent medieval towns with castle connections are highly recommended. Morestel Medieval Town and Castle is considered a superb destination offering a charming experience. Another is Crémieu, medieval town, which boasts a rich architectural heritage including the Delphinal castle, a 16th-century hall, and a cloister.
The Cingle Castle, first mentioned in 1540, is a fortified house built in the second half of the 14th century and is listed as a historical monument. Additionally, the Château de Bienassis, originally a fortified house from the late 14th century, was later given the appearance of a medieval castle in 1897 and features unique architectural details like false machicolation and stained glass.
Absolutely. Both Morestel Medieval Town and Castle and Crémieu, medieval town are categorized as family-friendly, offering engaging experiences for visitors of all ages to explore their historical settings.
The region around Trept offers various outdoor activities. You can find numerous hiking trails, with options like the 'Ramparts loop from Siccieu-Saint-Julien-et-Carisieu' or the 'Étang Bouvet – Château de Montagnieu loop'. For cyclists, there are road cycling routes, including one that passes by the Château Delphinal of Crémieu, and touring bicycle routes like the 'Crémieu–Morestel Greenway'. You can find more details on these activities in the Hiking around Trept, Road Cycling Routes around Trept, and Cycling around Trept guides.
Yes, the Château de Bienassis has a connection to the famous French poet Alphonse de Lamartine, who made several stays there between 1804 and 1808 with his friend Nicolas Prosper Guichard.
The fortified house of Poype de Serrières is a significant landmark in Trept. This late 13th-century structure, expanded in the 15th and 16th centuries, features 19th-century frescoes and was continuously occupied by the La Poype family for 20 generations. It was classified as a Historic Monument in 1992, underscoring its cultural and architectural importance.
Visitors frequently praise the charming and pleasant atmosphere of the medieval towns, such as Morestel Medieval Town and Castle and Crémieu, medieval town. The rich architectural heritage, including old houses, halls, and cloisters, is a major draw. The komoot community has shown appreciation for the variety of castles, sharing 4 photos and giving 24 upvotes to the highlights in the area.
The Château Delphinal of Crémieu, dating back to the 12th century, stands on a strategic promontory and showcases the city's development with its imposing fortified gates and a majestic market hall. Its historical significance is further highlighted by Crémieu being classified as a Protected Area for Urban and Landscape Architectural Heritage.
Exploring on foot allows you to fully appreciate the narrow streets and architectural details of medieval towns like Crémieu. Many sites are also accessible by car, and for those who enjoy combining history with activity, cycling routes are available that pass by several historical landmarks. Consider planning a route that incorporates both a castle visit and a scenic walk or ride.


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