Final answer:
A castle is a large fortified building or buildings that were the strongholds of noblemen in the Middle Ages. They were used as residences and military fortifications, representing power and authority.
Step-by-step explanation:
A castle is a large fortified building or buildings that were the strongholds of noblemen in the Middle Ages. It was typically built with thick stone walls, towers, and battlements for defense purposes. Castles were not only used as residences but also as military fortifications.
For example, the famous castle of Krak des Chevaliers in Syria was a stronghold of the Knights Hospitaller during the Crusades.
Castles played a significant role in medieval society and were symbols of power and authority.
Learn more about Medieval Castles