a Koadjutor is in the catholic church a bishop, who is placed to another bishop to the side. In the Roman church it becomes after CIC CAN. 403 § 3 of the canonical right by the holy chair appointed; other churches plan other regulations(z. B. Choice by Diözesansynode). The Koadjutor possesses, contrary to the bishop, special powers and has the right of the follow-up.
In the Roman church the Diözesanbischof has it in accordance with. CAN. to appoint 406 § 2 the Generalvikar. It should to a Sedisvakanz of the bishop chaircome, then takes over in accordance with. CAN. 409 § 1 the Koadjutor the bishop force over the Diözese, for which he was ordered.
The last Koadjutor in Germany was the emeritierte archbishop of Hamburg, Dr. Ludwig Averkamp. 1985 it - at that time bishop in Münster - became the support of bishop Dr. Wittler after Osnabrück appoint. 1987 it followed it as a bishop von Osnabrück.