Castillon-sur-Agen, Medieval castle ruins in Bon-Encontre, France.
Castillon-sur-Agen is a castle ruin on a high plateau near Agen. The site incorporates natural rock formations into its defensive walls, creating a single fortified structure that makes full use of the elevated terrain.
The castle was built during the 12th century and became a focal point in the conflicts between English and French powers. Military campaigns and sieges marked its existence throughout that era.
The name comes from the Castilian settlement that once developed here. The layout and remaining stonework show how medieval fortifications adapted to the natural landscape of the region.
The ruins sit on an elevated position with views across the surrounding countryside toward Agen. Access is straightforward from the nearby village of Bon-Encontre below the plateau.
The site was built on top of an earlier settlement from the early medieval period, creating multiple layers of history beneath the visible fortifications. This overlap of periods makes it particularly interesting for those studying how medieval communities developed.
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