Fort Saint-Thierry, Military fortress near Pouillon, France

Fort Saint-Thierry is a ruined triangular fort near Pouillon, built between 1877 and 1880 as part of a regional defence system. Its earthworks and masonry walls enclose several brick and stone buildings, including barracks and magazines, now roofless and overgrown with woodland.

The fort was built between 1877 and 1880 as part of the regional defense system. During World War I it became a site of intense conflict and changed hands multiple times between warring armies.

The fort served as a key military position during World War I and witnessed intense fighting between armies. Today its remains tell the story of the conflict that shaped this region.

The site requires sturdy footwear and caution when exploring, as structures are in ruinous condition and paths wind through woodland. Access is limited and requires patience when navigating the grounds.

After the war, villagers from nearby settlements salvaged stones from the damaged sections to rebuild their homes. This explains the highly fragmented state of the ruins seen today.