Plural of chancellery; the offices or residences of a chancellor, or the offices of a diplomatic mission or embassy.
From chancellery (from Old French 'chancellerie', from 'chancelier', from Latin 'cancellarius'—originally an official who stood near the latticed screen in Roman courts). The suffix -ery means a place or office.
The word 'chancellery' traces directly back to Roman courtrooms where officials literally stood 'at the cancellus' (the latticed barrier)—so modern diplomatic buildings are named after medieval furniture, connecting bureaucracy to medieval architecture.
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