Origin of the Eucharist the "Didache", "1 Clement" and Ignatius of Antioch provide glimpses of what Christians were doing in their eucharists. Later sources, Tertullian and the "Apostolic Tradition", offer some details from around the year 200. Once the Church "went public" after the conversion of Constantine the Great in the second decade of the fourth century, it was clear that the Eucharist was established as a central part of Christian life. Contemporary scholars debate whether Jesus meant to institute a ritual at his Last Supper; whether the Last Supper was an actual historical event in any way related to the undisputed early "Lord's
Real presence of Christ in the Eucharist by the ordinance of Jesus. This view is known as Memoralism or the Zwinglian view, as it was taught by Huldrych Zwingli, a Swiss Reformer. Many Christian churches holding to a doctrine of the real presence of Christ in the Eucharist (for example, Catholic, Eastern Orthodox, Lutheran, Anglican, Reformed, and Methodist) require ordained clergy, to officiate at the Eucharist, consecrating and distributing the elements to communicants. Some groups, mostly Protestants, require church leaders who may or may not be ordained (pastors, elders and deacons) to preside over the elements and distribute them. Real presence of Christ in the Eucharist The