with an abbey A Vicar Apostolic (normally a bishop of a titular see), in charge of an apostolic vicariate, usually in a mission country, not yet ready to be made a diocese A Prefect Apostolic (usually not a bishop), in charge of an apostolic prefecture, not yet ready to be made an apostolic vicariate A Permanent Apostolic Administrator, in charge of a geographical area that for serious reasons cannot be made a diocese. To these may be added: An Apostolic Exarch (normally a bishop of a titular see), in charge of an apostolic exarchate—not yet ready to be made an eparchy—for the faithful of an Eastern Catholic Church in an area that is situated outside the home territory of that Eastern Church. A Patriarchal Exarch, a bishop in charge of a patriarchal exarchate—not yet ready to be made an eparchy—for the faithful of an Eastern Catholic Church in an area situated within the home territory of that patriarchal Eastern Church. A Military Ordinary, serving Catholics in a country's armed forces A Personal Prelate, in charge of a group of persons without regard to geography: the only personal prelature existing is that of Opus Dei. An apostolic administrator of a personal apostolic administration: only one exists, the Personal Apostolic Administration of Saint John Mary Vianney An ordinary of a personal ordinariate for former Anglicans A superior of an autonomous mission Of somewhat similar standing is the diocesan administrator (formerly called a vicar capitular) elected to govern a diocese during a vacancy. Apart from certain limitations of nature and law, he has, on a caretaker basis, the same obligations and powers as a diocesan bishop (canons 427–429 of the 1983 Code of Canon Law). Occasionally an apostolic administrator is appointed by the Holy See to run a vacant diocese, or even a diocese whose bishop is incapacitated or otherwise impeded. Other bishops A diocesan bishop may have bishops who assist in his ministry. The coadjutor bishop of a see has the right of succession on the death or resignation of the diocesan bishop, and, if the see is an archdiocese, holds the title of archbishop. Similarly, a retired diocesan bishop keeps his connection with the see to which he was appointed, and is known as bishop (or archbishop) emeritus of that see. On the other hand, an auxiliary bishop, who may also hold posts such as vicar general or episcopal vicar, is