How did the castles change over the Norman period?

During the Norman period, castles evolved significantly in design and purpose. Initially constructed as motte-and-bailey structures, they transformed into more robust stone fortifications, featuring high walls, towers, and gatehouses to better withstand attacks and enhance defense. This shift reflected the Normans' military strategies and their need to project power and authority over newly conquered territories. Additionally, as peace settled, many castles began to serve as administrative centers and symbols of status rather than solely military strongholds.