[[File:Rev._DrDr. John Chrysavgis Updated Photo.JPG|left|thumb|250px|Rev. Dr._John_Chryssavgis_-_PhotoJohn Chryssavgis <br />''Photo Courtesy of N.jpgManginas'']] '''The Rev. Dr. John Chryssavgis''' (born 1 April 1958) is an author and [[theologian]] who serves as advisor to the [[Ecumenical Patriarch]] on environmental issues. He is a clergyman [[clergy]]man of the [[Greek Orthodox Archdiocese of America]]. In January 2012, he became the first in history to receive received the title of '''Archdeacon of the Ecumenical Throne''' by [[Bartholomew I (Archontonis) of Constantinople|His All-Holiness Ecumenical Patriarch Bartholomew]].

Rev. John Chryssavgis was born in Australia in on [[April 1]], 1958. He matriculated from the Scots College in Sydney, New South Wales in 1975 and received his degree in Theology from the University of Athens in 1980. He received a diploma in [[Byzantine Music]] from the Greek Conservatory of Music in 1979 and was awarded a research scholarship to [[St. Vladimir]]'s Orthodox Theological Seminary (Crestwood, New York)|St. Vladimir's Theological Seminary ]] in 1982. He completed his doctoral studies in [[Patristics]] at the University of Oxford in 1983. Chryssavgis read patristic theology at Oxford. His work and writing have focused on medieval theology, as well as on the history of the Eastern Church. He holds degrees in [[theology]] and sacred music. 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. His interests have embraced the areas of [[spirituality]], ecology, and [[liturgy]]. His research has specialized in the [[ascetic]] thought and practice of the early Church, especially from the desert tradition of Egypt (4th fourth century) through the regions of Palestine (5thfifth-6th sixth centuries) and Sinai (7th seventh century). After several months in silent retreat on [[Mt Athos]], he worked with the Greek Orthodox Primate in Australia (1984-94) and was co-founder of [[St. Andrew's Greek Orthodox Theological College (Sydney, Australia)|St Andrew]]'s Theological College ]] in Sydney, where he was Sub-Dean and taught Patristics and Church History (1986-95). He was also Lecturer in the Divinity School (1986-90) and the School of Studies in Religion (1990-95) at the University of Sydney.<ref>"About Rev. Dr. John Chryssavgis" [http://cappellaromana.blogspot.com/2007/10/about-rev-dr-john-chryssavgis-and-his.html]</ref>{{Verify credibility|date=May 2008}}

In 1995, he moved to Boston, where he was appointed Professor of Theology at [[Holy Cross Greek Orthodox School of Theology (Brookline, Massachusetts)|Holy Cross School of Theology]] and directed the Religious Studies Program at [[Hellenic College (Brookline, Massachusetts)|Hellenic College]] until 2002. He established the Environment Office at the same School in 2001. He has also taught as professor of [[Patristics]] at [[St. John of Damascus Institute of Theology (Tripoli, Lebanon)|Balamand University ]] in Lebanon.

In recent years, he has published several books and countless articles in international journals and encyclopedias 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)

*''Cosmic Grace, Humble Prayer: Ecological Vision of Ecumenical Patriarch Bartholomew, [[Eerdmans Books]], Grand Rapids MI, 2003. Revised and updated, 2009.

*''The Reflections of Abba Zosimas: Monk of the Palestinian Desert, [[SLG Press]]: Oxford, 2004. Reprinted 2006.

*''In the World, Yet Not of the World: Social and Global Initiatives of Ecumenical Patriarch Bartholomew, [[Fordham University Press]], New York, 2009.

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