Retired Professors UniID Please fill out this field using the example format provided in the placeholder. The phone number will be handled in accordance with GDPR. Count Persons (14) Contact Phone E-Mail Details Prof. Dr. Bernd Diekkrüger - In retirement since 01.10.2019 - b.diekkrueger@uni-bonn.de Prof. Dr. Richard Dikau - In retirement since 01.03.2016 - ridikau@uni-bonn.de Prof. Dr. Eckart Ehlers - In retirement since 01.04.2004 - eckart.ehlers@t-online.de Hon.-Prof. Dr. Karl-Heinz Erdmann - In retirement since 01.10.2025 - khe-1956-bonn@web.de Prof. (em.) Dr. Klaus Fehn - In retirement since 01.04.2001 - k.fehn@uni-bonn.de Prof. Dr. Klaus Greve - In retirement since 01.08.2023 - klaus.greve@uni-bonn.de Prof. Dr. Reinhold Grotz - In retirement since 01.04.2004 - r.grotz@uni-bonn.de Apl. Prof. Dr. Hans Dieter Laux - In retirement since 01.04.2007 - hdlaux@uni-bonn.de Prof. Dr. Winfried Schenk - In retirement since 01.09.2022 - wschenk@uni-bonn.de Prof. Dr. Helmuth Toepfer - In retirement since 01.03.2009 - helmuth.toepfer1@gmx.de Prof. Dr. Sabine Tröger - In retirement since 01.04.2020 - stroeger@uni-bonn.de Prof. Dr. Claus-Christian Wiegandt - In retirement since 01.04.2023 - wiegandt@uni-bonn.de Prof. Dr. Matthias Winiger - In retirement since 01.04.2011 - winiger@uni-bonn.de Hon.-Prof. Dr. Thomas Zumbroich - In retirement since 01.10.2025 - tz@zumbroich.com
