How do you know people lived in castles?

Evidence of people living in castles comes from historical records, archaeological findings, and architectural features. Historical texts often describe the daily lives of nobility and their households within these structures, while excavations have uncovered artifacts, tools, and remnants of living quarters. Additionally, the design of castles, including kitchens, Great Halls, and living spaces, indicates they were built to accommodate residents. Overall, the combination of these sources provides a clear picture of life in castles throughout history.