Medieval city castle guide

The medieval fortress of Beynes, the jewel of the Yvelines, has been linked to Diane de Poitiers.

A medieval fortress of the Yvelines, Beynes Castle hides a centuries‑old history and an unexpected link to Diane de Poitiers. Just 30 km from Paris, in the heart of this Yvelines town, its ruins—listed as a Historic Monument—are open to visits year‑round in Beynes. We set out to explore the site on a short break and now reveal a portion of its secrets.

This medieval tower, offering a breathtaking panoramic view of Essonne, was once used to measure the speed of light.

Perched atop a 30-meter-high hill, the Montlhéry Tower offers a breathtaking panoramic view of Essonne and the Île-de-France region. This historic medieval relic, officially listed as a Monument Historique, once served as a laboratory for some of the greatest scientists of the 19th century. Whether you're interested in its history, planning a visit, or just taking a leisurely walk, here's everything you need to know.

Château de la Madeleine in Chevreuse, a Medieval Treasure in Ile-de-France

Available all year round, the Château de la Madeleine in Chevreuse, a medieval jewel in the Ile-de-France region, invites you to immerse yourself in history.

Château de Blandy-les-Tours, a medieval monument in a charming Seine-et-Marne village

The little-known Château de Blandy-les-Tours, located in the very center of a picturesque village in the Seine-et-Marne region, boasts a rich heritage that has spanned history, wars and centuries. A true medieval fortress that has been preserved to the present day, it is one of the most impressive castles in the Île-de-France region. We take you on a voyage of discovery.