scholar at the Institute, within the framework of the DFG-Project "The Formation of Public Criminal Law", Sub-project: "The ecclesiastical basis of public criminal law in the classic time of Canon Law from 1140-1234 on the basis of the sources of scholarly law"
2001-2 sponsored by the Gerda-Henkel-Foundation
WS 2004/5 visting professor during the sabbatical of
Prof. Dr. Theo Kölzer (Historisches Seminar der rheinischen
Friedrich-Wilhelms-Universität, Bonn, Abt. Hist. Hilfswissenschaften und