Prosopon is a technical term encountered in Christian theology. It is most often translated as "person", and as such is sometimes confused with hypostasis, which is sometimes also translated as "person." Prosopon originally meant "face" or "mask" and derives from Greek theatre, in which actors on a stage wore masks to reveal their character and emotional state to the audience. Both prosopon and hypostasis played central roles in the development of theology about the Trinity and about Jesus Christ in the debates of the fourth through seventh centuries.

1. Overview
The term "prosopon" is used for "the self-manifestation of an individual" that can be extended by means of other things. For example, a painter includes his brush within his own prosopon. Grillmeier, 126
St. Paul uses the term when speaking of his direct apprehension in the heart of the Face prosopon of Christ II Cor 4:6.
Prosopon is the form in which hypostasis appears. Every hypostasis has its own proper prosopon: face or countenance. It gives expression to the reality of the hypostasis with its powers and characteristics. Grillmeier, 431
Two distinct Antiochene Christologists, Theodore of Mopsuestia, followed by his disciple Nestorius, supported the prosopic union of the two natures physes of Jesus Christ rather than the accepted hypostatic union.
Theodore of Mopsuestia maintained a vision of Christ that saw a prosopic union of the divine and human. This was a union where Jesus was only a man indissolubly united to God through the permanent indwelling of the Logos. Grillmeir, 428-39 He believed the incarnation of Jesus represents an indwelling of the spirit of God that is separate from the indwelling experienced by the Old Testament prophets or New Testament apostles. Jesus was viewed as a human being who shared the divine sonship of the Logos; the Logos united himself to Jesus from the moment of Jesus conception. After the resurrection, the human Jesus and the Logos reveal that they have always been one prosopon. Norris, 25
Theodore addresses the prosopic union in applying prosopon to Christ. He accounts for two expressions of Christ – human and divine. Yet, he does not mean Christ achieved a unity of the two expressions through the formation of a third prosopon, but that one prosopon is produced by the Logos giving his own countenance to the assured man. Grillmeier, 432 He interprets the unity of God and man in Christ along the lines of the body-soul unity. Prosopon plays a special part in his interpretation of Christ. He rejected the Hypostasis concept – believing it to be a contradiction of Christ’s true nature. He espoused that, in Christ, both body and soul had to be assumed. Christ assumed a soul and by the grace of God brought it to immutability and to a full dominion over the sufferings of the body. Grillmeier, 424-27
Nestorius furthered Theodore’s belief in the prosopic union as thus: "prosopon is the appearance of the ousia: the prosopon makes known the ousia." The two prosopa are united "In Christ… the one prosopon does not belong to a nature or hypostasis which arose through the natural union of Godhead and manhood, but to the unity of the two unconfused natures." Grillmeier, 510
Nestorian notion of "two persons" prosopic duality caused heated debates among Christian theologians in the first half of the 5th century, resulting in official condemnation of such views. The Third Ecumenical Council 431 affirmed the teaching of "One Person" of Jesus Christ, condemning all other teachings. The Fourth Ecumenical Council 451 reaffirmed the notion of One Person of Jesus Christ, formulating the famous Chalcedonian Definition with its "monoprosopic" having one person clauses, and in the same time explicitly denying the validity of "dyoprosopic" having two persons views.

Prosoplasia from Ancient Greek: προσωπον prosopon face πλάσις plasis, formation is the differentiation of cells either to a higher function or
philosophical concept of person arose, taking the word prosopon Ancient Greek: πρόσωπον, romanized: prosōpon from the Greek theatre. Therefore, Christus the
Aline Hornaday, Toward a Prosopography of the Maubeuge Cycle Saints Prosopon Newsletter, 1996 on - line text. Thurston, Herbert. St. Aldegundis. The
Prakrti a similar term found in Hinduism Principle of individuation Prosopon or persona Reification fallacy Substance theory The Encyclopedia of Christianity
Arthur. The Peerage of England. Google Books Keats - Rohan, Katherine S. B., Additions and Corrections to Sanders s Baronies Prosopon Newsletter. 2000
Spanish Trancon, Santiago 2006 Castañuela 70 in Spanish Madrid: Prosopon Editeroes. ISBN 9788493430740. Pop Español in Spanish 3. Barcelona:
not only in two natures, but also in two hypostases and two persons prosopon the human Jesus and the divine Logos. Apart from that, the ancient Church
another person or object. The term literally derives from the Greek roots prosopon face, person and poiein to make, to do and is also called personification
director of the Brussels Studies Institute. He founded a publishing company, Prosopon Editions. He was educated at the Universite Libre de Bruxelles ULB where
Variations for Tenor Bassoon in F and Piano 2013 Vincenzo Toscano Prosopon for Tenor Bassoon in G, 2 Bassoons and Contrabassoon 2018 Carla Magnan
appears in the writings of the Greek historian, Polybius who named it Theou Prosopon or Face of God. The Greek geographers, Ptolemy and Strabon, also mentioned