Katharina Berner is a Research Fellow at Humboldt University Berlin, Faculty of Law. She studied German and Anglo-American law at the University of Münster and King’s College London. As a guest lecturer, she taught at the German Federal Academy of Public Administration and Wrocław University. Her current research relates to treaty interpretation under the Vienna Convention and was substantially conducted in the context of the International Law Commission’s work on “Subsequent agreements and subsequent practice in relation to the interpretation of treaties.”