The office, rank, or position of an archbishop; also the area under an archbishop's authority.
From Medieval Latin 'archiepiscopatus,' combining 'archiepiscopus' (archbishop) with the suffix '-ate' used to indicate an office or territory.
The suffix '-ate' is used for major political and religious positions—'papacy,' 'episcopate,' 'archiepiscopate'—because it comes from Latin and still carries that official, authoritative weight in English.
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