The phrase an Englishman's home is his castle suggests that a
man can do whatever he likes in his own home. The phrase may have
originated from a 17th century law in England which stated that no
one may enter a man's home unless invited.
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One proverb that pertains is " A man's home is his castle." I do
not claim that it is "The correct Proverb" .
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The British history of "a man's home is his castle".