Timeline

Heritage classified

Key figures

Origin and history

The castle of Yssertieux was founded in the 9th century, with a first mention of the site, then in the 11th century, where the lords of the gate built a castle. The four towers and the courtine still visible probably date back to the 14th century, but they were thoroughly redesigned in 1424 for Odast de la Porte, reflecting the military adaptations of the era. These stone structures, partially filled with brick, illustrate medieval defensive architecture, with machicolis (now missing on the south side of the entrance) and screw staircases serving the floors and the chapel integrated into the south tower.

In the 4th quarter of the 15th century, Pierre de la Porte built the entrance building, marking a transition to a more residential function. In the 16th century, Jean V de la Porte obtained permission to establish a chapel there, symbolizing the religious influence of the local lords. A major turning point occurred in 1656, when the north dungeon was replaced by a new house, modernizing the whole. Finally, in 1856, two galleries replaced the west and east courtines, the house was raised from one floor, and the windows of the towers were modified, reflecting the architectural tastes of the 19th century. The castle, partially classified as a Historical Monument in 1967, preserves facades and roofs of the 15th, 17th and 18th centuries, as well as an surrounding park.

The materials used — stone, brick in filling, slate roofs or flat tiles — and the successive developments (slides in screws, private chapels, galleries) bear witness to the evolution of the defensive, residential and symbolic needs of its owners. Today, the site remains closed to visit and photography, preserving its mystery and historical integrity.

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