A chorbishop is a rank of Christian clergy below bishop. The name chorepiscope or chorepiscopus (pl chorepiscopi) is taken from the Greek Χωρεπίσκοπος and means rural bishop. In fact, a chorbishop is an honorary prelate, or archpriest, in several of the Eastern Christian Churches, and it should not be confused with the sacramental Order of Bishop.
Chorepiscopi are first mentioned by Eusebius as existing in the second century. In the beginning, it seems the chorepiscopi exercised regular episcopal functions in their rural districts, but from the late third century they were subject to city or metropolitan bishops. The Synod of Ancyra (314) specifically forbade them to ordain deacons or priests. The Council of Sardica (343) decreed that no chorepiscopus should be consecrated where a priest would suffice, and so the chorepiscopi in the Byzantine Church gradually disappeared.
The first mentions of chorepiscopi in the Western church are from the 5th or 6th century, where they were found mainly in Germany (especially Bavaria) and the Frankish lands. In the Western Church they were treated as an auxiliary bishop and operated like archdeacons or vicars general. They gradually disappeared as an office by the 12th century in the West and were replaced by archdeacons to administer subdivisions of a diocese.
In the ruling house of Kakheti in medieval Georgia, the title of chorepiscopus (k'orepiskoposi or k'orikozi) became secular and was borne by several princes of that province.
Both Catholic and Eastern Orthodox churches still have chorbishops. In some Orthodox churches, "chorbishop" is an alternate name for an auxiliary bishop. The Churches of the Syriac tradition, namely the Syriac Orthodox Church, the Assyrian Church of the East, the Syrian Catholic Church, the Maronite Church, the Chaldean Catholic Church, the Indian Orthodox Church, the Syro-Malabar Church, the Syro-Malankara Catholic Church, the Malankara Jacobite Syriac Orthodox Church and Malankara Orthodox Syrian Church also preserve the office, calling it corepiscopa or coorepiscopa. In these churches, the corepiscopa vests almost identically to the bishop and often serves as his representative to various liturgical events to add solemnity.