eparchy

noun5

1. •
   In pre-schism Christian Church, a province under the supervision of the metropolitan.
2. •
   In Eastern Christendom, a diocese of a bishop.
3. •
   (historical) A district of the Roman Empire at the third echelon
4. •
   (historical) A provincial government or office headed by an eparch in the Greek-speaking Eastern Roman Empire (akin to a prefecture governed by a prefect in the Latin-speaking Western Roman Empire)
5. •
   (historical) An administrative sub-provincial unit in post-Ottoman independent Greece.