Pope Francis waves attends a Mass for Jubilee of Deacons in St. Peter's Square on May 29, 2016 in Vatican City, Vatican. The Church marked the Extraordinary Jubilee Year of Mercy in a special way with the Jubilee of Deacons. As their very title suggests taken as it is from the Greek word for 'servant', diakonos Deacons are ordained to a ministry of service in the Church.