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The earliest known use of the term "transubstantiation" to describe the change from bread and wine to body and blood of Christ was by Hildebert de Lavardin, Archbishop of Tours (died 1133), in the eleventh century and by the end of the twelfth century the term was in widespread use.[5] The Fourth Council of the Lateran, which convened beginning November 11, 1215,[6] spoke of the bread and wine as "transubstantiated" into the body and blood of Christ: "His body and blood are truly contained in the sacrament of the altar under the forms of bread and wine, the bread and wine having been transubstantiated, by God's power, into his body and blood".[7]

During the Protestant Reformation, the doctrine of transubstantiation was heavily criticised as an import into Christian teaching of Aristotelian "pseudo-philosophy",[8] in favor of Martin Luther's doctrine of sacramental union, or in favor, per Huldrych Zwingli, of the Eucharist as memorial.[9]

The Council of Trent in its thirteenth session ending October 11, 1551, defined transubstantiation as "that wonderful and singular conversion of the whole substance of the bread into the Body, and of the whole substance of the wine into the Blood - the species only of the bread and wine remaining - which conversion indeed the Catholic Church most aptly calls Transubstantiation".[10] This council officially approved use of the term "transubstantiation" to express the Catholic Church's teaching on the subject of the conversion of the bread and wine into the body and blood of Christ in the Eucharist,[11] with the aim of safeguarding Christ's presence as a literal truth, while emphasizing the fact that there is no change in the empirical appearances of the bread and wine.[12] It did not however impose the Aristotelian theory of substance and accidents: it spoke only of the species (the appearances), not the philosophical term "accidents", and the word "substance" was in ecclesiastical use for many centuries before Aristotelian philosophy was adopted in the West,[13] as shown for instance by its use in the Nicene Creed which speaks of Christ having the same "%u03BF%u1F50%u03C3%u03AF%u03B1" (Greek) or "substantia" (Latin) as the Father.
[edit] Patristic period

The belief that the Eucharist conveyed to the believer the body and blood of Christ appears to have been widespread from an early date, and the elements were commonly referred to as the body and the blood by early Christian writers. The early Christians who use these terms also speak of it as the flesh and blood of Christ, the same flesh and blood which suffered and died on the cross.

The short document known as the Teaching of the Apostles or Didache, which may be the earliest Christian document outside of the New Testament to speak of the Eucharist, says, "Let no one eat or drink of the Eucharist with you except those who have been baptized in the Name of the Lord,"[14] for it was in reference to this that the Lord said, "Do not give that which is holy to dogs." Matthew 7:6

A letter by Saint Ignatius of Antioch to the Romans, written in AD 106 says: "I desire the bread of GOD, which is the flesh of Jesus Christ."[15]

Writing to the Christians of Smyrna, in about AD 106, Saint Ignatius warned them to "stand aloof from such heretics", because, among other reasons, "they abstain from the Eucharist and from prayer, because they confess not the Eucharist to be the flesh of our Savior Jesus Christ, which suffered for our sins, and which the Father, of His goodness, raised up again."[16]

In about 150, Justin Martyr wrote of the Eucharist: "Not as common bread and common drink do we receive these; but in like manner as Jesus Christ our Savior, having been made flesh by the Word of God, had both flesh and blood for our salvation, so likewise have we been taught that the food which is blessed by the prayer of His word, and from which our blood and flesh by transmutation are nourished, is the flesh and blood of that Jesus who was made flesh."[17]

Justin Martyr wrote, in Dialogue with Trypho, ch 70: "Now it is evident, that in this prophecy to the bread which our Christ gave us to eat, in remembrance of His being made flesh for the sake of His believers, for whom also He suffered; and to the cup which He gave us to drink, in remembrance of His own blood, with giving of thanks."

In about 200 AD, Tertullian wrote (Against Marcion IV. 40): "Taking bread and distributing it to his disciples he made it his own body by saying, 'This is my body,' that is a 'figure of my body.' On the other hand, there would not have been a figure unless there was a true body."

The Apostolic Constitutions (compiled c. 380) says: "Let the bishop give the oblation, saying, The body of Christ; and let him that receiveth say, Amen. And let the deacon take the cup; and when he gives it, say, The blood of Christ, the cup of life; and let him that drinketh say, Amen."[18]

Saint Ambrose of Milan (d. 397) wrote:

Perhaps you will say, "I see something else, how is it that you assert that I receive the Body of Christ?" ... Let us prove that this is not what nature made, but what the blessing consecrated, and the power of blessing is greater than that of nature, because by blessing nature itself is changed. ... For that sacrament which you receive is made what it is by the word of Christ. But if the word of Elijah had such power as to bring down fire from heaven, shall not the word of Christ have power to change the nature of the elements? ... Why do you seek the order of nature in the Body of Christ, seeing that the Lord Jesus Himself was born of a Virgin, not according to nature? It is the true Flesh of Christ which was crucified and buried, this is then truly the Sacrament of His Body. The Lord Jesus Himself proclaims: "This is My Body." Before the blessing of the heavenly words another nature is spoken of, after the consecration the Body is signified. He Himself speaks of His Blood. Before the consecration it has another name, after it is called Blood. And you say, Amen, that is, It is true. Let the heart within confess what the mouth utters, let the soul feel what the voice speaks."[19]

Other fourth-century Christian writers say that in the Eucharist there occurs a "change",[20] "transelementation",[21] "transformation",[22] "transposing",[23] "alteration"[24] of the bread into the body of Christ.

In AD 400, Augustine quotes Cyprian (AD 200): "For as Christ says 'I am the true vine,' it follows that the blood of Christ is wine, not water; and the cup cannot appear to contain His blood by which we are redeemed and quickened, if the wine be absent; for by the wine is the blood of Christ typified, ...