Reinhard M. Hübner, Dr.theol. (1970) and Habil. (1976), University of Bonn, is Professor of Early Church History at the University of Munich. He has published especially on Gregory of Nyssa (Brill, 1974), Apolinarius of Laodicea and Basilius of Caesarea (De Gruyter, 1989).Markus Vinzent, Dr.theol. (1991), University of Munich, and Habil. (1995), University of Heidelberg, is H.G. Wood Professor of Theology at the University of Birmingham. He has published on Asterius of Cappadocia (Brill, 1993), Ps.-Athanasius Contra Arianos IV (Brill, 1996), Marcellus of Ankyra (Brill, 1997), and on the history of the Romanum (De Gruyter, 1999).