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Origin and history

The castle of Quinsonnas is an ancient castle whose origins date back to the 12th century, although its current structures were thoroughly reshaped in the 17th century. Located on a hill of Sérézin-de-la-Tour, in the Isère department, it is distinguished by its two medieval circular towers still visible to the north. The building, now closed to the public, preserves traces of its military past while integrating classical architectural elements, such as a symmetrical south house and a filled central courtyard.

In 1224 Berlion de la Tour gave the fief of Quinsonnas to his brother, Jocelyn Viguier de Romans, one of the first historical records of the estate. The castle changed hands several times, notably in 1609, when François de Bonne de Lesdiguières, France's last connetable, became its owner. He exchanged it two years later for the Marquisat of Vizille, where he erected the famous castle of the same name. The linden trees of the main court of Quinsonnas, still present, would have been planted on his order.

In the 17th century, the owners undertook a major recomposition of the castle to make it a more symmetrical and monumental residence. The south house, the best preserved, consists of two pavilions framing a large porch, while the house is based on half-excavated vaulted rooms. The estate also includes recent outbuildings and a second courtyard, offering stunning views of the Bourbre valley and the Chartreuse massif. The family of Quinsonnas, notably Arthus Pourroy (1597–1779), master in Dauphiné's chamber of accounts, made a lasting mark on the history of the place.

Although the castle is not accessible to the public, its strategic location between Sérézin-de-la-Tour and Nivolas-Vermelle, as well as its proximity to the station of Caxle, makes it a notable historical site of the Auvergne-Rhône-Alpes region. Its architecture combines medieval heritage and classical transformations, reflecting the political and social evolutions of Dauphiné throughout the centuries.

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