Born 1962; 1992 Dr.theol. Ludwig-Maximilians-University in Munich; 1999 Habilitation in Church History at the Humboldt University in Berlin; since 2000 Professor of Church History (from the Early Church to the Time of Reformation) at the University of Zurich.
Born 1959; 1986 D.Phil. in literae humaniores with a specialization in Ancient History, Oxford University; since 2002 Sidney H. Ehrman Professor of History and Classics at the University of California, Berkeley; Spring 2017 Hedi-Fitz-Niggli Professor at the University of Zurich.