Eucharistic theologyEucharistic theology is a branch of Christian theology which treats doctrines concerning the Holy Eucharist, also commonly known as the Lord's Supper. It exists exclusively in Christianity and related religions, as others generally do not contain a Eucharistic ceremony. In the Gospel accounts of Jesus' earthly ministry, a crowd of listeners challenges him regarding the rain of manna before he delivers the famous Bread of Life Discourse (John 6:22–59), and he describes himself as the "True Bread from Heaven".
Host desecrationHost desecration is a form of sacrilege in Christian denominations that follow the doctrine of the real presence of Christ in the Eucharist. It involves the mistreatment or malicious use of a consecrated host—the bread used in the Eucharistic service of the Divine Liturgy or Mass (also known by Protestants simply as Communion bread). It is forbidden by the Catholic, Oriental Orthodox, and Eastern Orthodox Churches, as well as in certain Protestant traditions (including Anglicanism, Lutheranism, and Methodism).
Sacramental unionSacramental union (Latin: unio sacramentalis; Martin Luther's German: Sacramentliche Einigkeit; German: sakramentalische Vereinigung) is the Lutheran theological doctrine of the Real Presence of the body and blood of Christ in the Christian Eucharist (see Eucharist in Lutheranism). The sacramental union is distinguished from the other "unions" in theology like the "personal union" of the two natures in Jesus Christ, the "mystical union" of Christ and his Church, and the "natural union" in the human person of body and soul.
LutheranismLutheranism is a major branch of Protestantism, identifying primarily with the theology of Martin Luther, the 16th-century German monk and reformer whose efforts to reform the theology and practices of the Catholic Church launched the Protestant Reformation. The split between the Lutherans and the Roman Catholics was made public and clear with the 1521 Edict of Worms.
Real presence of Christ in the EucharistThe real presence of Christ in the Eucharist is the Christian doctrine that Jesus Christ is present in the Eucharist, not merely symbolically or metaphorically, but in a true, real and substantial way. There are a number of Christian denominations that teach that Christ is truly present in the Eucharist, including Catholicism, Eastern Orthodoxy, Oriental Orthodoxy, the Church of the East, the Moravian Church, Lutheranism, Anglicanism, Methodism, Irvingism and Reformed Christianity.