Doctor of Philosophy, 1970. Doctor of Philosophy (honorary), University Thessaloniki, Greece, 2003. Doctor of Philosophy (honorary), German University Administrative Sciences Speyer, 2006.
Volunteer president Indiana Commission, 1991—1998. Member commission Federal Republic Germany, 1994—1998. Vice president Commission, 1996—1998.
Vice president federal constitutional court Government of Germany, 1998—2001, president, federal constitutional court, since 2002.
Married; 2 children.