How have castles changed over time?

Answer 1

theyve changed in size (olden day have gotten smaller-ruins but recently built will wear down longer, become more resistant, larger for longer)

royalty (royalty dont neccesarily live in castles nowadays, when back then they did.)

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There is also the additon of a secret, sex chamber in Buckingham palace which is now very common in modern castles unlike in old fashioned castles.

Answer 2

they evolved from wood to stone to keep the safest part of the castle protected from fires and rebels.