The Fortress of Fenestrelle is a historic military fortification located in the Piedmont region of Italy. Constructed between 1720 and 1850, it was designed to defend against potential invasions from France. The fortress is known for its impressive architecture and strategic position on a mountain ridge. Spanning over 3 kilometers, the fortress features a series of walls, bastions, and tunnels. It played a significant role during various conflicts, including the Italian Wars of Independence. Today, the Fortress of Fenestrelle is a popular tourist attraction, offering guided tours and stunning views of the surrounding landscape.