Strzelczyk, J. 1993. "Omnis pacis artifex" : Archbishop of Magdeburg Wichman and his era: Review: Archbishop Wichmann (1152-1192) and Magdeburg in the High Middle Ages. City - Archdiocese - Empire. The exhibition on the 800th anniversary of Archbishop Wichmann’s death from October 29, 1992 to March 21, 1993. Published by Matthias Puhle, Magdeburg 1992. Our Past. 80, (Dec. 1993), 369–376. DOI:https://doi.org/10.52204/np.1993.80.369-376.