Yes, the keep was the heart of residential life in a castle, though its primary function was defensive. In the 11th and 12th centuries, the keep (or donjon) was the safest and most substantial building where the lord and his family lived, ate, and slept. A supportive peer "daily life" insight: life in a keep was far from glamorous by modern standards. It was often dark, damp, and smoky due to limited ventilation and small windows designed more for archery than light. The main hall served as a multipurpose space for feasting and business, while the upper floors held private chambers (solars). As architectural styles evolved into the 14th century, many nobles moved their living quarters to more comfortable "palace" wings within the outer walls, but the keep remained the final refuge during a siege and a symbol of the lord's ultimate power and status.