A government office or public building; specifically, a palace or seat of government authority in ancient Greece.
From Greek 'archeion,' related to 'archon' meaning 'ruler' or 'magistrate,' from 'arche-' meaning 'rule' or 'authority.' This described important administrative buildings.
In ancient Athens, the 'archeion' was where magistrates worked—it's the root of our word 'archive,' since governments stored their important documents in these official buildings!
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