Claus Kreß

About/Bio

Claus Kreß (Dr. jur. Cologne; LL.M. Cantab.) is Professor for Criminal Law and Public International Law. He holds the Chair for German and International Criminal Law and he is Director of the Institute of International Peace and Security Law at the University of Cologne. His prior practice was in the German Federal Ministry of Justice on matters of criminal law and international law. Since 1998 he has been representing Germany in the negotiations regarding the International Criminal Court. Claus Kreß is co-editor of several law journals, including the Journal of International Criminal Justice and the Journal of the Use of Force and International Law. He is Life Member of Clare Hall College at the University of Cambridge, Member of the Academy of Sciences and Arts of Northrhine-Westfalia and recipient of the 2014 M.C. Bassiouni Justice Award.

Recently Published

80 Years After Nuremberg’s Foundational Moment: On the Current Situation of the Crime of Aggression

The text below is a reproduction of Prof Dr Claus Kreß’ keynote address at the 2026 Nuremberg Forum, as delivered on 7 October at Court Room 600, Nuremberg. As readers of the blog know, we occasionally publish longer texts or lectures that we consider speak significantly to the moment. ‘If this be an innovation, it is…

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For an Effective and Legitimate Jurisdictional Regime on the Crime of Aggression at Last: States Parties to the Statute of the International Court to Convene on Monday for a Special Session in New York

As of Monday, a window of historic opportunity will be open for States Parties to the Rome Statute of the International Criminal Court (ICC Statute) for three days to provide the Court with a more effective and more legitimate legal framework for the exercise of jurisdiction over the crime of aggression. The following blogpost sets…

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Germany and International Criminal Law: Some Additional Reflections in Light of Another Set of Current Developments

In my post of March 12, 2024, on this blog, I offered some reflections on what I called a ‘noteworthy touch of Janus-facedness’ regarding Germany’s position on the issue of functional immunity and international criminal law. To briefly recapitulate, in November 2023, Germany’s Government had informed the International Law Commission (ILC) of its…

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