Medieval castles were large, fortified structures built during the Middle Ages to protect against invasions and attacks. They often featured thick stone walls, tall towers, and a central courtyard. Castles served as homes for nobles and their families, as well as military strongholds. Many castles were strategically located on hills or near rivers to enhance their defenses. Inside, castles had various rooms, including living quarters, kitchens, and great halls for feasting. They also contained dungeons for prisoners and storage areas for food and weapons. Over time, castles evolved into symbols of power and wealth, reflecting the importance of feudalism in medieval society.