Tourbillon Castle
Wallis
Tourbillon Castle, located in Sion in the canton of Valais, Switzerland, is a striking medieval fortress built at the end of the 13th century under Bishop Boniface de Challant. Perched atop a steep, rocky hill, it served as the residence of the bishops of Sion and was part of a strategic defensive network alongside the nearby Basilique de Valère. The castle features a courtyard surrounded by walls, a central keep on a rocky mound, its own chapel, and a garrison building. It suffered significant damage during conflicts in the 14th and 15th centuries, notably being burnt down in 1417 during the Raron affair and later destroyed by fire in 1788. The ruins were reinforced in the 19th and 20th centuries and are now recognized as a Swiss heritage site of national significance. The hill itself has archaeological evidence of habitation dating back to the Neolithic era, highlighting the long-standing importance of this site. Visitors today can explore the castle ruins freely from March to November, enjoying panoramic views over Sion and the surrounding Rhône valley.
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Tip: The best time to visit Tourbillon Castle is from mid-March to mid-November when the ruins are accessible. Visitors should consider purchasing tickets or guided tours in advance during peak tourist seasons. The castle is accessible only from the east or west due to the steep terrain, so comfortable footwear is recommended. Discounts may be available for seniors, students, or groups. Facilities such as toilets are available near the chapel area for visitor convenience.
Interesting facts
- •The castle is situated 182 meters above the city of Sion, providing commanding views of the Rhône valley.
- •Archaeological excavations revealed Neolithic dwellings dating back to the 5th millennium BC on the hill.
- •The castle was part of a defensive pair with the Basilique de Valère located on the opposite hill.
- •The name 'Tourbillon' may derive from Latin words meaning 'spinning top' or from a combination of words relating to towers and a proper name 'Billion' or 'Billon'.
- •The castle was rebuilt in the mid-15th century after destruction in the Raron affair and later destroyed by fire in 1788 during a great city fire.
History
The first mention of the name 'Tourbillon' dates back to 1268, with the castle's construction beginning around 1297-1298 under Bishop Boniface de Challant.
The castle was built as part of efforts to strengthen Sion's fortifications against rebellious nobles.
It was occupied and damaged several times in the 14th and 15th centuries, including destruction during the Raron affair in 1417.
Bishop William III of Raron rebuilt it between 1440 and 1450.
In 1788, a massive city fire destroyed the castle again, and although restoration was planned, it was never completed due to political upheaval.
The ruins were later stabilized and preserved as a historic monument starting in the 19th century, with ongoing restoration managed by a dedicated foundation.
Place Guide
Castle Keep13th century
The central fortified tower of Tourbillon Castle, located on a small rocky mound at the center of the plateau, served as the main defensive stronghold and residence of the bishops.
Castle Chapel15th century (renovation)
A chapel within the castle complex, originally built in the Middle Ages and renovated during the 15th century reconstruction, featuring medieval frescoes and religious artifacts.
Castle Courtyard and WallsLate 13th to 15th centuries
The courtyard is protected by surrounding defensive walls, enclosing the keep, chapel, and garrison buildings, demonstrating medieval military architecture adapted to steep terrain.
Contact
Phone: 027 322 52 00
