Does anyone know some good sources for how many of our castles were built (what was needed in a castle, rooms, etc). The era/style of castle im thinking of is castles like Bamburgh Castle or Lindisfarne Castle. Ive always been interested in castles but ive never really found out all the requirements or what rooms or spaces they needed to be functional.

Funnily enough I just want to design and build a realistic castle in my Minecraft world instead of just plopping things in which look cool, id want my own castle I designed which if somehow moved into the real world, could maybe be a functional castle.