On October 19, 2013, the 19th Annual Synergy Symposium titled "The Book of Revelation" was hosted by St. George Antiochian Orthodox Church in Cicero, Illinois  and its rector, Archpriest Nicholas Dahdal, Economos. Orthodox Christian Synergy  sponsored the event, which featured speaker Fr. George Dragas, Professor of Patristics at Holy Cross Orthodox Seminary in Brookline, Massachusetts.
Orthodox Christian Synergy is a pan-Orthodox organization of clergy and lay representatives from greater Chicago's Orthodox Christian parishes seeking to spread the Orthodox Christian faith. Synergy works together with its parent organization, the Orthodox Christian Clergy Association of Greater Chicago, with the blessings of the Chicago-area Orthodox hierarchs. The audio of the Symposium is available  on Ancient Faith Radio.