Question: The Eucharist was allegedly instituted by whom?
About the article "Last Supper", section "Institution of the Eucharist".

Candidate passages:
In a special letter on the Eucharist and the Church, Benedict describes the Eucharist, causal principle of the Church.
He opines that the Church was founded by Christ in the sacrifice of the Cross.
At the same time, he describes the Church as his Bride and his body.
This concept, the Church as the mystical body of Christ, goes back to St. Paul and has been subject to many conversations by The Fathers of the Church but also more recently at Vatican II.
A contemplative gaze "upon him whom they have pierced" (Jn 19:37) leads us to reflect on the causal connection between Christ's sacrifice, the Eucharist and the Church.
The Church "draws her life from the Eucharist" (31).
Since the Eucharist makes present Christ's redeeming sacrifice, we must start by acknowledging that "there is a causal influence of the Eucharist at the Church's very origins."
The Eucharist is Christ who gives himself to us and continually builds us up as his body.
Hence, in the striking interplay between the Eucharist which builds up the Church, and the Church herself which "makes" the Eucharist, the primary causality is expressed in the first formula: the Church is able to celebrate and adore the mystery of Christ present in the Eucharist precisely because Christ first gave himself to her in the sacrifice of the Cross.
The Church's ability to "make" the Eucharist is completely rooted in Christ's self-gift to her.
What does this mean?
According to Benedict, the Eucharist which is union with Christ has a profound impact on our social relations.
Because "union with Christ is also union with all those to whom he gives himself.
I cannot possess Christ just for myself; I can belong to him only in union with all those who have become, or who will become, his own."
"At the Last Supper, on the night he was betrayed, our Saviour instituted the Eucharistic sacrifice of his Body and Blood."
(Catechism of the Catholic Church 1323)Eucharist in the Catholic Church refers to both the celebration of the Mass, that is, the Eucharist liturgy, and the bread and wine which after the consecration are transubstantiated (changed in substance) into the body and blood of Jesus Christ, Lord and God, a declaration formulated by the Council of Trent with an anathema against anyone who denied this.
"Blessed Sacrament" is a devotional term used in the Roman Catholic Church to refer to the Eucharistic species (the Body and Blood of Christ). 
For Lutherans the Eucharist is not considered to be a valid sacrament unless the elements are used according to Christ's mandate and institution (consecration, distribution, and reception).
This was first formulated in the Wittenberg Concord of 1536 in the formula: "Nihil habet rationem sacramenti extra usum a Christo institutum" ("Nothing has the character of a sacrament apart from the use instituted by Christ").
To remove any scruple of doubt or superstition, the "reliquiæ" traditionally are either consumed, poured into the earth, or reserved (see below).
In most Lutheran congregations, the administration of private communion of the sick and "shut-in" (those too feeble to attend services) involves a completely separate service of the Eucharist for which the sacramental elements are consecrated by the celebrant.
Today, some Lutheran churches offer the Eucharist weekly, while others offer it every other Sunday.
Weddings and funerals sometimes include the celebration of the Eucharist in Lutheran churches.
At the ordinations of pastors/priests and the consecration of bishops, the Eucharist is always offered. 
 Sunday.
The feast of Divine Mercy Sunday was instituted by Pope John Paul II and is celebrated the Sunday after Easter on the General Roman Calendar, and is associated with specific indulgences.
In an entry in her diary, Faustina stated that anyone who participates in the Mass and receives the sacraments of Confession and the Eucharist on this day is assured by Jesus of full remission of their sins and punishments. 
Parker was ordained as a deacon in 1923 and as a priest in 1924.
He was an assistant curate at St Bartholomew & St Jude's Birmingham.
He was vicar of All Saints' King's Heath, Birmingham (1939-57), rural dean of King's Norton (1943-57), honorary canon of Birmingham ( 1944-61) and Archdeacon of Aston(1946-54).
During his curacy at St Jude's he and his vicar, the Reverend Denis Tyndall, compiled "Adoremus: A Book of Eucharistic Worship for the Young".
The book was described as "primarily for use at what is known as the Children's Eucharist", but was also "to meet the need of the increasing number of parishes in which there is the 'Parish Eucharist'".
It was regularly used for the children's Eucharist at All Saints' King's Heath and also for the Parish Eucharist instituted by Michael Parker to replace Matins as the main Sunday morning service.
Parker was consecrated as the suffragan Bishop of Aston in 1954; and translated as diocesan Bishop of Bradford in 1961.
On retirement in 1971 he was appointed an assistant bishop in the dioceses of Coventry and Worcester.