Constitutional Law: especially access to justice and judicial review.
German, European and international Administrative Law:
1958-1963 Studies in law and classics at the Universities of Göttingen and Geneva.
1967 Doctor of Laws, Faculty of Law, University of Göttingen.
1971 Habilitation by the University of Göttingen.
1972-79 Professor of Law at the University of Bochum, and for several years judge (part-time) at the Higher Administrative Court of North Rhine-Westphalia.
Since 1979 Professor of Law at the University of Heidelberg. Director of the Institute for German and European Administrative Law; since 2006 emeritus.
Memberships and appointments:
1994 - Member of the Berlin-Brandenburg Academy of Sciences and Humanities (formerly known as Prussian Academy of Sciences).
1997-98 Fellow of the Berlin Institute of Advanced Studies.
1993-99 Member of the German Science Council (“Wissenschaftsrat”).
1988-96 Reviewer for the German Research Foundation (“Deutsche Forschungsgemeinschaft”).
Other Memberships include the Association of German Constitutional Law Professors (Member of the Board 1982-83); German Jurists Forum (Member of the Board 1996-2002); Society for Comparative Law, French Association of Administrative Law, European Public Law Group.
Doctor honoris causa: National and Kapodistrias University of Athens, the University of Huelva, and the University La Sapienza Rome.
Key book publications:
Verwaltungsrechtliche Dogmatik, Tübingen (Mohr Siebeck), 2013.
Kohärenz und Konsistenz des Verwaltungsrechtsschutzes (Mohr Siebeck), 2015.