Château de Rosanbo, Gothic castle in Lanvellec, France

Château de Rosanbo stands above the Bô valley at Lanvellec in Côtes-d'Armor, built up over six centuries from the 15th to the 19th century. Its pale masonry forms a vast quadrilateral around a closed courtyard, with round corner towers under conical and domed slate roofs, a taller square tower with a pointed roof, and rows of windows with light stone surrounds. The 18th-century architect Joubert added large windows and Mansart roofs.

The castle was built as a fortified structure in the 14th century, and it took the name Rosanbo when King Louis XIV granted the Le Peletier family the right to use that title. The family maintained close ties to the property across the following generations.

The castle's library holds thousands of volumes that reveal what the family read over centuries. The Breton room shows how the family combined traditional regional life with their aristocratic home.

The castle opens seasonally, generally from spring through autumn, with guided tours of both the interior rooms and the gardens. Going early in the day gives you more time in the gardens before visitor numbers build up.

The castle's library holds thousands of books collected by the family over centuries, and it can still be seen during guided tours. Many of the volumes date from the 17th and 18th centuries and have remained in place, on the same shelves, since they were first put there.