What rooms are inside REAL medieval castles?

Castles look incredible from the outside, but what's on the inside? What type of rooms would you expect to find within a historical medieval castle?

Principles of castle design: https://www.youtube.com/watch?v=sJkXRDKdAcM&t

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Music track "Castle" by Kevin Macleod

Видео What rooms are inside REAL medieval castles? канала Shadiversity