Plural of archdeaconry; multiple jurisdictions, territories, or offices governed by archdeacons.
From archdeaconry (archdeacon + -ry, suffix indicating territory or jurisdiction) with plural -ies. Multiple diocesan divisions each under an archdeacon's authority.
Large medieval dioceses were divided into archdeaconries so bishops didn't go crazy managing everything themselves—it was basically the church's solution to the problem of 'too many churches, not enough bishops!'
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