John Chryssavgis

John Chryssavgis (born 1 April 1958) is an Orthodox Christian theologian who serves as advisor to the Ecumenical Patriarch on environmental issues.

He matriculated from the Scots College in Sydney in 1975 and received his degree in theology from the University of Athens in 1980.

His teaching has covered wide-ranging topics, such as theological, political, and social developments, themes and personalities of the Middle Ages, including cultural and religious relations and tensions between East and West.

After several months in silent retreat on Mount Athos, he worked with the Greek Orthodox Primate in Australia (1984–1994) and was co-founder of St Andrew's Theological College in Sydney, where he was Sub-Dean and taught Patristics and Church History (1986–1995).

In recent years, he has published several books and countless articles in international journals and encyclopaedias in the area of religion and ecology, social justice and peace, with forthcoming books including John Climacus: from the Egyptian Desert to the Sinaite Mountain (Ashgate, UK, Winter 2004); and Light Through Darkness: Insights into Orthodox Spirituality (Orbis Books, Summer 2004) He currently serves as theological advisor to the Ecumenical Patriarch on environmental issues.