The chief financial officer or highest-ranking treasurer in an organization, court, or government.
From 'arch-' (chief) plus 'treasurer' (from Old French 'tresorier', one who manages treasure/funds). This administrative title appears in records of royal courts, universities, and ecclesiastical institutions throughout medieval and Early Modern Europe.
The 'archtreasurer' controlled the king's or bishop's money, making it one of the most powerful 'arch-' positions. Following the money in history shows that whoever held this title had enormous influence over kingdoms!
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