The exact number of castles in the Aosta Valley is not known, but it is estimated that there are over 100 castles in the region.These castles range in size and style, from medieval fortresses and imposing stone structures, to more modest castle ruins. Many of the castles in the Aosta Valley are well-preserved and open to the public, offering visitors a glimpse into the region's rich history and cultural heritage.Some of the most famous castles in the Aosta Valley include:Castle of Saint-Pierre: A medieval castle located in the town of Saint-Pierre, with a long and fascinating history dating back to the 11th century.Castle of Issogne: A well-preserved castle located in the town of Issogne, known for its stunning architecture and rich history.Castle of Fénis: A well-preserved castle located in the town of Fénis, known for its beautiful gardens and stunning views of the surrounding mountains.