John S. Romanides is an American-born Greek Orthodox priest and professor who, for a long time, filled the role of representing the Greek Church to the World Council of Churches. Among other things, he has contributed many insights, some controversial, into the cultural and religious differences between Eastern and Western Christianity, and how these divergences have impacted the ways in which Christianity has developed and been lived out in the Christian cultures of East and West. Romanides has held the roles of Professor of Dogmatic Theology at Holy Cross Theological School of Brookline, Massachusetts, and Professor Emeritus of the School of Theology at the University of Thessalonica. He is currently a Professor of Theology at Balmand Theological School, in Lebanon.