This collection of essays covers fundamental aspects of the Eucharist, from the biblical notion of 'memorial' to the issues of intercommunion and the relationship between the Eucharist and the Church. The chapters give evidence of increasing theological convergence in the thinking of contemporary Eastern and Western theologians on the Eucharist. This consensus is the result of developments in biblical studies, our increasing knowledge of the Fathers, and the findings of liturgical studies and the historical study of the Church's liturgy in the East and the West.