Medieval fortresses were large, fortified structures built during the Middle Ages to protect against invasions and attacks. They often featured thick stone walls, towers, and moats, making them difficult to breach. These fortifications served as homes for nobles and their families, as well as military strongholds for defending territories. Many medieval fortresses were strategically located on hills or near important trade routes. They played a crucial role in the feudal system, where local lords governed the surrounding lands. Famous examples include Carcassonne in France and Edinburgh Castle in Scotland, showcasing the architectural styles of their time.