The forts of medieval Europe, often called castles, were built to protect against invasions and to serve as homes for nobles. These structures featured thick stone walls, tall towers, and moats to deter attackers. Many castles were strategically located on hills or near rivers, providing a vantage point for spotting enemies. Inside the castles, life revolved around the lord and his family, along with their knights and servants. The great hall was the heart of the castle, where feasts were held and important decisions made. Over time, these forts evolved into symbols of power and prestige, reflecting the feudal system of the era.