The office, position, or jurisdiction of a chamberlain, or the domain they oversee.
Derived from 'chamberlain' (from Old French 'chambellan') plus the suffix '-ry' indicating a domain or collection. Chamberlains were high-ranking officials in medieval courts.
A chamberlain controlled the entire household budget and staff in medieval castles—so 'chamberlainry' referred to the most powerful behind-the-scenes position in the kingdom, handling money and secrets more than anyone except the king.
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