This collection provides several state of the question essays on current research in a variety of Eucharistic prayers in the Churches of East and West, including attention to other issues of Eucharistic praying and theology. For all who seek solid and up-to-date scholarship on Eucharistic liturgy and theology, this volume offers an ecumenical guide from New Testament texts through Addai and Mari, the so-called Apostolic Tradition, and Roman Canon, through the diversity of Eastern and Oriental Orthodox anaphoras, up to and including the sources for the prefaces of the Missal of Paul VI. Close attention is also given to questions such as the origins of the Sanctus, Eucharistic consecration, as well as other historical and theological questions from within Eucharistic praying.