The Eucharist /ˈjuːkərɪst/ (also called Holy Communion, the Lord's Supper, among others) is a Christian rite that is considered a sacrament in most churches. According to the New Testament, It was instituted by Jesus Christ during His Last Supper. Giving His disciples bread and wine during the Passover meal, Jesus commanded His followers to "do this in memory of Me" while referring to the bread as "My Body" and the wine as "My Blood". Through the Eucharistic celebration Christians remember Christ's sacrifice of Himself on the cross.
The elements of the Eucharist, bread (leavened or unleavened) and wine (or grape juice), are consecrated on an altar (or Communion table) and consumed thereafter. Communicants (that is, those who consume the elements) may speak of "receiving the Eucharist", as well as "celebrating the Eucharist".
Christians generally recognize a special presence of Christ in this rite, though they differ about exactly how, where, and when Christ is present. While all agree that there is no perceptible change in the elements, Catholics believe that they actually become the body and blood of Christ. Others believe the true body and blood of Christ are really present in, with, and under the bread and wine which remain physically unchanged, others believe in a real but purely spiritual presence of Christ in the Eucharist, and still others take the act to be only a symbolic reenactment of the Last Supper. Some Protestants view the Eucharist as an ordinance in which the ceremony is seen not as a specific channel of divine grace, but as an expression of faith and of obedience to Christ.