These Proceedings present the results of the 13th International Colloquium on Gregory of Nyssa: a systematic commentary on Gregory's In Canticum in the form of sixteen papers and a selection of fourteen short essays devoted to various issues.

Giulio Maspero, Ph.D. (1999, 2003) in Physics (University of Milan, Italy) and in Theology (University of Navarra, Spain) is Professor of Systematic Theology at the Pontifical University of the Holy Cross (Rome). He has published extensively on Gregory of Nyssa. Miguel Brugarolas, Ph.D. (2011) in Theology (University of Navarra, Spain) is currently Assistant Professor of Systematic Theology at the University of Navarra. He has published on Gregory of Nyssa's Trinitarian theology and Christology. Ilaria Vigorelli, Ph.D. (2008, 2018) in Philosophy (University of Calabria, Italy) and in Theology (Pontifical University of the Holy Cross, Italy) is teaching Systematic Theology at the Pontifical University of the Holy Cross. She has published on Postmodernism and Patristics.