The story
From a man's home is his castle; for more information, see Wikipedia at castle doctrine § History.
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: A legal doctrine that designates a person's abode, or any legally occupied place, such as a vehicle or workplace, as a place in which that person has protections and immunities permitting him or her to use force to defend against intrusion. Full definition →
From a man's home is his castle; for more information, see Wikipedia at castle doctrine § History.
Etymology from Wiktionary, CC BY-SA 4.0.